These are the automatically-generated release notes:
```
## What's Changed
* Toolchain upgrade to nightly-2025-05-04 by @thanhnguyen-aws in #4059
* Automatic toolchain upgrade to nightly-2025-05-05 by @github-actions in #4060
* Automatic toolchain upgrade to nightly-2025-05-06 by @github-actions in #4061
* Enable target features: x87 and sse2 by @thanhnguyen-aws in #4062
* Fix the bug: Loop contracts are not composable with function contracts  by @thanhnguyen-aws in #3979
* Automatic cargo update to 2025-05-12 by @github-actions in #4066
* Bump tests/perf/s2n-quic from `6aa9975` to `5f323b7` by @dependabot in #4068
* Fix stabilization instructions in RFC intro by @carolynzech in #4067
* Add support for quantifiers by @qinheping in #3993
* Toolchain upgrade to nightly-2025-05-07 by @thanhnguyen-aws in #4070
* Automatic toolchain upgrade to nightly-2025-05-08 by @github-actions in #4071
* Automatic toolchain upgrade to nightly-2025-05-09 by @github-actions in #4072
* Automatic toolchain upgrade to nightly-2025-05-10 by @github-actions in #4073
* Clippy/Stylistic Fixes by @carolynzech in #4074
* Upgrade toolchain to 2025-05-14 by @zhassan-aws in #4076
* Autoharness argument validation: only error on `--quiet` if `--list` was passed by @carolynzech in #4069
* Upgrade Rust toolchain to 2025-05-16 by @zhassan-aws in #4080
* Automatic toolchain upgrade to nightly-2025-05-17 by @github-actions in #4081
* Add setup scripts for Ubuntu 20.04 by @zhassan-aws in #4082
* Automatic toolchain upgrade to nightly-2025-05-18 by @github-actions in #4083
* Automatic cargo update to 2025-05-19 by @github-actions in #4086
* Automatic toolchain upgrade to nightly-2025-05-19 by @github-actions in #4085
* Automatic toolchain upgrade to nightly-2025-05-20 by @github-actions in #4091
* Bump tests/perf/s2n-quic from `5f323b7` to `22434aa` by @dependabot in #4089
* Fix the error that Kani panics when there is no external parameter in quantifier's closure. by @thanhnguyen-aws in #4088
* Update toolchain to 2025-05-22 by @carolynzech in #4098
* Use our toolchain when invoking `cargo metadata` by @carolynzech in #4090
* Automatic toolchain upgrade to nightly-2025-05-23 by @github-actions in #4099
* Automatic toolchain upgrade to nightly-2025-05-24 by @github-actions in #4101
* Automatic toolchain upgrade to nightly-2025-05-25 by @github-actions in #4102
* Fix a bug codegening `SwitchInt`s with only an otherwise branch by @bkirwi in #4095
* Automatic toolchain upgrade to nightly-2025-05-26 by @github-actions in #4104
* Automatic cargo update to 2025-05-26 by @github-actions in #4105
* Bump tests/perf/s2n-quic from `22434aa` to `550afb3` by @dependabot in #4106
* Automatic toolchain upgrade to nightly-2025-05-27 by @github-actions in #4107
* Update `kani::mem` pointer validity documentation by @carolynzech in #4092
* Add support for edition 2018 crates using assert! (Fixes #3717) by @sintemal in #4096
* Automatic toolchain upgrade to nightly-2025-05-28 by @github-actions in #4113
* Automatic toolchain upgrade to nightly-2025-05-29 by @github-actions in #4115
* Automatic toolchain upgrade to nightly-2025-05-30 by @github-actions in #4118
* Handle generic defaults in BoundedArbitrary derives by @zhassan-aws in #4117
* Automatic cargo update to 2025-06-02 by @github-actions in #4121
* Bump tests/perf/s2n-quic from `550afb3` to `8f54b57` by @dependabot in #4122
* Upgrade Rust toolchain to 2025-06-02 by @zhassan-aws in #4123
* Automatic toolchain upgrade to nightly-2025-06-03 by @github-actions in #4125
* Finish deprecating `--enable-unstable`, `--restrict-vtable`, and `--write-json-symtab` by @carolynzech in #4110
* `ty_mangled_name`: only use non-mangled name if `-Zcffi` is enabled. by @carolynzech in #4114
* Improve Help Menu by @carolynzech in #4109
* Start stabilizing `--jobs` and `list`; deprecate default memory checks by @carolynzech in #4108
* Refactor simd_bitmask to reduce the number of iterations by @zhassan-aws in #4129
* Set target features depending on the target architecture by @zhassan-aws in #4127
* Bump some versions suggested by cargo-outdated by @zhassan-aws in #4131
* Improve linking error output for `#[no_std]` crates by @AlexanderPortland in #4126
* Fix the git log command in the toolchain update script by @zhassan-aws in #4139
* Gate quantifiers behind an experimental feature by @thanhnguyen-aws in #4141
* Automatic cargo update to 2025-06-09 by @github-actions in #4145

## New Contributors
* @bkirwi made their first contribution in #4095
* @sintemal made their first contribution in #4096
* @AlexanderPortland made their first contribution in #4126

**Full Changelog**: kani-0.62.0...kani-0.63.0
```


By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 and MIT licenses.

---------

Co-authored-by: Carolyn Zech <carolynzech@gmail.com>