This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[symbol-observable](https://redirect.github.com/blesh/symbol-observable)
| dependencies | major | [`^1.2.0` ->
`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)
|

---

### Release Notes

<details>
<summary>blesh/symbol-observable (symbol-observable)</summary>

###
[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)

##### Bug Fixes

- If Symbol.for doesn't exist, just use Symbol
([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),
closes
[#&elastic#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)

##### Code Refactoring

- Revert to `symbol` from `unique symbol`, the latter caused
compatibility issues and provided no real benefit.
([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))

##### BREAKING CHANGES

- Following the advice of the TypeScript team, the type for
`Symbol.observable` is reverted back to `symbol` from `unique symbol`.
This is to improve compatibility with other libraries using this module.
Sincerely sorry for the trashing. Getting the types right for modules is
hard. If this continues to cause issues for you, please file an issue
with the [TypeScript
project](https://redirect.github.com/microsoft/typescript).

###
[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)

##### Bug Fixes

- **TypeScript:** `Symbol.observable` is now `unique symbol`.
([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),
closes
[#&elastic#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)
- **TypeScript:** `Symbol[Symbol.observable]` is no longer incorrectly
defined
([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))

##### BREAKING CHANGES

- **TypeScript:** Older versions of `@types/node` will clash with this,
because `@types/node` incorrectly defined `Symbol.observable` has
`symbol` and not `unique symbol`. Update to `@types/node@14.14.6` or
higher.

####
[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)
(2020-09-30)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

####
[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)
(2020-09-29)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

####
[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)
(2020-09-04)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

###
[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

###
[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)

##### Bug Fixes

- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

**BREAKING CHANGE**: This moves to using `Symbol.for` to create the
symbol instance. It's *possible* that some runtimes that support
`Symbol` do not support `Symbol.for`. Therefor, I'm marking this as a
breaking change. If you find that you hit this issue, please report it.
You can work around it by polyfilling `Symbol.for`.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy40MjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOk9wZXJhdGlvbnMiLCJiYWNrcG9ydDphbGwtb3BlbiIsInJlbGVhc2Vfbm90ZTpza2lwIl19-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>
(cherry picked from commit 3683b17)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[symbol-observable](https://redirect.github.com/blesh/symbol-observable)
| dependencies | major | [`^1.2.0` ->
`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)
|

---

### Release Notes

<details>
<summary>blesh/symbol-observable (symbol-observable)</summary>

###
[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)

##### Bug Fixes

- If Symbol.for doesn't exist, just use Symbol
([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),
closes
[#&elastic#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)

##### Code Refactoring

- Revert to `symbol` from `unique symbol`, the latter caused
compatibility issues and provided no real benefit.
([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))

##### BREAKING CHANGES

- Following the advice of the TypeScript team, the type for
`Symbol.observable` is reverted back to `symbol` from `unique symbol`.
This is to improve compatibility with other libraries using this module.
Sincerely sorry for the trashing. Getting the types right for modules is
hard. If this continues to cause issues for you, please file an issue
with the [TypeScript
project](https://redirect.github.com/microsoft/typescript).

###
[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)

##### Bug Fixes

- **TypeScript:** `Symbol.observable` is now `unique symbol`.
([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),
closes
[#&elastic#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)
- **TypeScript:** `Symbol[Symbol.observable]` is no longer incorrectly
defined
([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))

##### BREAKING CHANGES

- **TypeScript:** Older versions of `@types/node` will clash with this,
because `@types/node` incorrectly defined `Symbol.observable` has
`symbol` and not `unique symbol`. Update to `@types/node@14.14.6` or
higher.

####
[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)
(2020-09-30)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

####
[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)
(2020-09-29)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

####
[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)
(2020-09-04)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

###
[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

###
[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)

##### Bug Fixes

- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

**BREAKING CHANGE**: This moves to using `Symbol.for` to create the
symbol instance. It's *possible* that some runtimes that support
`Symbol` do not support `Symbol.for`. Therefor, I'm marking this as a
breaking change. If you find that you hit this issue, please report it.
You can work around it by polyfilling `Symbol.for`.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy40MjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOk9wZXJhdGlvbnMiLCJiYWNrcG9ydDphbGwtb3BlbiIsInJlbGVhc2Vfbm90ZTpza2lwIl19-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>
(cherry picked from commit 3683b17)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[symbol-observable](https://redirect.github.com/blesh/symbol-observable)
| dependencies | major | [`^1.2.0` ->
`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)
|

---

### Release Notes

<details>
<summary>blesh/symbol-observable (symbol-observable)</summary>

###
[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)

##### Bug Fixes

- If Symbol.for doesn't exist, just use Symbol
([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),
closes
[#&elastic#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)

##### Code Refactoring

- Revert to `symbol` from `unique symbol`, the latter caused
compatibility issues and provided no real benefit.
([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))

##### BREAKING CHANGES

- Following the advice of the TypeScript team, the type for
`Symbol.observable` is reverted back to `symbol` from `unique symbol`.
This is to improve compatibility with other libraries using this module.
Sincerely sorry for the trashing. Getting the types right for modules is
hard. If this continues to cause issues for you, please file an issue
with the [TypeScript
project](https://redirect.github.com/microsoft/typescript).

###
[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)

##### Bug Fixes

- **TypeScript:** `Symbol.observable` is now `unique symbol`.
([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),
closes
[#&elastic#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)
- **TypeScript:** `Symbol[Symbol.observable]` is no longer incorrectly
defined
([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))

##### BREAKING CHANGES

- **TypeScript:** Older versions of `@types/node` will clash with this,
because `@types/node` incorrectly defined `Symbol.observable` has
`symbol` and not `unique symbol`. Update to `@types/node@14.14.6` or
higher.

####
[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)
(2020-09-30)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

####
[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)
(2020-09-29)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

####
[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)
(2020-09-04)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

###
[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

###
[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)

##### Bug Fixes

- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

**BREAKING CHANGE**: This moves to using `Symbol.for` to create the
symbol instance. It's *possible* that some runtimes that support
`Symbol` do not support `Symbol.for`. Therefor, I'm marking this as a
breaking change. If you find that you hit this issue, please report it.
You can work around it by polyfilling `Symbol.for`.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy40MjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOk9wZXJhdGlvbnMiLCJiYWNrcG9ydDphbGwtb3BlbiIsInJlbGVhc2Vfbm90ZTpza2lwIl19-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>
(cherry picked from commit 3683b17)

…22651)

# Backport

This will backport the following commits from `main` to `8.18`:
- [Update dependency symbol-observable to v4 (main)
(#203291)](#203291)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"elastic-renovate-prod[bot]","email":"174716857+elastic-renovate-prod[bot]@users.noreply.github.com"},"sourceCommit":{"committedDate":"2025-06-04T19:38:28Z","message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c","branchLabelMapping":{"^v9.1.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Operations","release_note:skip","backport:all-open","v9.1.0"],"title":"Update
dependency symbol-observable to v4
(main)","number":203291,"url":"https://github.com/elastic/kibana/pull/203291","mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/203291","number":203291,"mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}}]}]
BACKPORT-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>

…2653)

# Backport

This will backport the following commits from `main` to `9.0`:
- [Update dependency symbol-observable to v4 (main)
(#203291)](#203291)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"elastic-renovate-prod[bot]","email":"174716857+elastic-renovate-prod[bot]@users.noreply.github.com"},"sourceCommit":{"committedDate":"2025-06-04T19:38:28Z","message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c","branchLabelMapping":{"^v9.1.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Operations","release_note:skip","backport:all-open","v9.1.0"],"title":"Update
dependency symbol-observable to v4
(main)","number":203291,"url":"https://github.com/elastic/kibana/pull/203291","mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/203291","number":203291,"mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}}]}]
BACKPORT-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>

…22652)

# Backport

This will backport the following commits from `main` to `8.19`:
- [Update dependency symbol-observable to v4 (main)
(#203291)](#203291)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"elastic-renovate-prod[bot]","email":"174716857+elastic-renovate-prod[bot]@users.noreply.github.com"},"sourceCommit":{"committedDate":"2025-06-04T19:38:28Z","message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c","branchLabelMapping":{"^v9.1.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Operations","release_note:skip","backport:all-open","v9.1.0"],"title":"Update
dependency symbol-observable to v4
(main)","number":203291,"url":"https://github.com/elastic/kibana/pull/203291","mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/203291","number":203291,"mergeCommit":{"message":"Update
dependency symbol-observable to v4 (main) (#203291)\n\nThis PR contains
the following updates:\n\n| Package | Type | Update | Change
|\n|---|---|---|---|\n|\n[symbol-observable](https://redirect.github.com/blesh/symbol-observable)\n|
dependencies | major | [`^1.2.0`
->\n`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)\n|\n\n---\n\n###
Release Notes\n\n<details>\n<summary>blesh/symbol-observable
(symbol-observable)</summary>\n\n###\n[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)\n\n#####
Bug Fixes\n\n- If Symbol.for doesn't exist, just use
Symbol\n([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),\ncloses\n[#&#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)\n\n#####
Code Refactoring\n\n- Revert to `symbol` from `unique symbol`, the
latter caused\ncompatibility issues and provided no real
benefit.\n([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))\n\n#####
BREAKING CHANGES\n\n- Following the advice of the TypeScript team, the
type for\n`Symbol.observable` is reverted back to `symbol` from `unique
symbol`.\nThis is to improve compatibility with other libraries using
this module.\nSincerely sorry for the trashing. Getting the types right
for modules is\nhard. If this continues to cause issues for you, please
file an issue\nwith the
[TypeScript\nproject](https://redirect.github.com/microsoft/typescript).\n\n###\n[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)\n\n#####
Bug Fixes\n\n- **TypeScript:** `Symbol.observable` is now `unique
symbol`.\n([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),\ncloses\n[#&#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)\n-
**TypeScript:** `Symbol[Symbol.observable]` is no longer
incorrectly\ndefined\n([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))\n\n#####
BREAKING CHANGES\n\n- **TypeScript:** Older versions of `@types/node`
will clash with this,\nbecause `@types/node` incorrectly defined
`Symbol.observable` has\n`symbol` and not `unique symbol`. Update to
`@types/node@14.14.6`
or\nhigher.\n\n####\n[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n(2020-09-30)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n####\n[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n(2020-09-29)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n####\n[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)\n(2020-09-04)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)\n\n#####
Bug Fixes\n\n- **package.json** ponyfill.d.ts added to
package\n([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))\n\n###\n[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)\n\n#####
Bug Fixes\n\n- **TypeScript** ponyfill types
added\n([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))\n\n###\n[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)\n\n#####
Bug Fixes\n\n- **package.json:** es/ponyfill.js no longer
typoed\n([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))\n-
Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n###\n[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)\n\n[Compare\nSource](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)\n\n#####
Bug Fixes\n\n- Resolve issues in environments with frozen
Symbol\n([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))\n\n**BREAKING
CHANGE**: This moves to using `Symbol.for` to create the\nsymbol
instance. It's *possible* that some runtimes that support\n`Symbol` do
not support `Symbol.for`. Therefor, I'm marking this as a\nbreaking
change. If you find that you hit this issue, please report it.\nYou can
work around it by polyfilling `Symbol.for`.\n\n</details>\n\n---\n\n###
Configuration\n\n📅 **Schedule**: Branch creation - At any time (no
schedule defined),\nAutomerge - At any time (no schedule defined).\n\n🚦
**Automerge**: Disabled by config. Please merge this manually once
you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes conflicted,
or you tick the\nrebase/retry checkbox.\n\n🔕 **Ignore**: Close this PR
and you won't be reminded about this update\nagain.\n\n---\n\n- [ ] If
you want to rebase/retry this PR, check\nthis box\n\n---\n\nThis PR has
been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
<174716857+elastic-renovate-prod[bot]@users.noreply.github.com>\nCo-authored-by:
Brad White
<brad.white@elastic.co>","sha":"3683b1711758dfde002ecc93bd1b44e2afe7410c"}}]}]
BACKPORT-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[symbol-observable](https://redirect.github.com/blesh/symbol-observable)
| dependencies | major | [`^1.2.0` ->
`^4.0.0`](https://renovatebot.com/diffs/npm/symbol-observable/1.2.0/4.0.0)
|

---

### Release Notes

<details>
<summary>blesh/symbol-observable (symbol-observable)</summary>

###
[`v4.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#400-2021-04-15)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/3.0.0...4.0.0)

##### Bug Fixes

- If Symbol.for doesn't exist, just use Symbol
([ef81924](https://redirect.github.com/blesh/symbol-observable/commit/ef81924c506ba2fcc171a9b9b78a7a290fbff7b2)),
closes
[#&elastic#8203;53](https://redirect.github.com/blesh/symbol-observable/issues/53)

##### Code Refactoring

- Revert to `symbol` from `unique symbol`, the latter caused
compatibility issues and provided no real benefit.
([72ce7dc](https://redirect.github.com/blesh/symbol-observable/commit/72ce7dcc5d22f8a67ec928b61e879e1ded7a0869))

##### BREAKING CHANGES

- Following the advice of the TypeScript team, the type for
`Symbol.observable` is reverted back to `symbol` from `unique symbol`.
This is to improve compatibility with other libraries using this module.
Sincerely sorry for the trashing. Getting the types right for modules is
hard. If this continues to cause issues for you, please file an issue
with the [TypeScript
project](https://redirect.github.com/microsoft/typescript).

###
[`v3.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#300-2020-11-02)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.3...3.0.0)

##### Bug Fixes

- **TypeScript:** `Symbol.observable` is now `unique symbol`.
([2ef1476](https://redirect.github.com/blesh/symbol-observable/commit/2ef147644cf78538b28c3fd9e66a3b8d569a1978)),
closes
[#&elastic#8203;41](https://redirect.github.com/blesh/symbol-observable/issues/41)
- **TypeScript:** `Symbol[Symbol.observable]` is no longer incorrectly
defined
([fe4301f](https://redirect.github.com/blesh/symbol-observable/commit/fe4301f37b54162e1a2db91e79c5b33d652496f1))

##### BREAKING CHANGES

- **TypeScript:** Older versions of `@types/node` will clash with this,
because `@types/node` incorrectly defined `Symbol.observable` has
`symbol` and not `unique symbol`. Update to `@types/node@14.14.6` or
higher.

####
[2.0.3](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)
(2020-09-30)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

####
[2.0.2](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)
(2020-09-29)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

####
[2.0.1](https://redirect.github.com/blesh/symbol-observable/compare/2.0.0...2.0.1)
(2020-09-04)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.3`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#203-2020-09-30)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.2...2.0.3)

##### Bug Fixes

- **package.json** ponyfill.d.ts added to package
([b25f5bf](https://redirect.github.com/blesh/symbol-observable/commit/b25f5bfe7425ad21f510428795de8b38aee70b2e))

###
[`v2.0.2`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#202-2020-09-29)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/2.0.1...2.0.2)

##### Bug Fixes

- **TypeScript** ponyfill types added
([10d2ec8](https://redirect.github.com/blesh/symbol-observable/commit/10d2ec8f0809ac9134be91378fc45c3578f675d4))

###
[`v2.0.1`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#201-2020-09-04)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/40d27a5db32813e18d433e943a1a9d6cb72c15fb...2.0.1)

##### Bug Fixes

- **package.json:** es/ponyfill.js no longer typoed
([ad2c079](https://redirect.github.com/blesh/symbol-observable/commit/ad2c079c71536eaf972101a25eb18f5bca94ab62))
- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

###
[`v2.0.0`](https://redirect.github.com/blesh/symbol-observable/blob/HEAD/CHANGELOG.md#200-2020-09-01)

[Compare
Source](https://redirect.github.com/blesh/symbol-observable/compare/1.2.0...40d27a5db32813e18d433e943a1a9d6cb72c15fb)

##### Bug Fixes

- Resolve issues in environments with frozen Symbol
([2323882](https://redirect.github.com/blesh/symbol-observable/commit/23238827ea234188b11774f43afcb5c8deeb278e))

**BREAKING CHANGE**: This moves to using `Symbol.for` to create the
symbol instance. It's *possible* that some runtimes that support
`Symbol` do not support `Symbol.for`. Therefor, I'm marking this as a
breaking change. If you find that you hit this issue, please report it.
You can work around it by polyfilling `Symbol.for`.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy40MjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOk9wZXJhdGlvbnMiLCJiYWNrcG9ydDphbGwtb3BlbiIsInJlbGVhc2Vfbm90ZTpza2lwIl19-->

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Brad White <brad.white@elastic.co>