…0, r=alexcrichton

Update core-foundation requirement from 0.6.0 to 0.7.0

Updates the requirements on [core-foundation](https://github.com/servo/core-foundation-rs) to permit the latest version.
<details>
<summary>Commits</summary>

- [`0a3ac83`](servo/core-foundation-rs@0a3ac83) Auto merge of [#349](https://github-redirect.dependabot.com/servo/core-foundation-rs/issues/349) - wez:timertypes, r=jdm
- [`a119788`](servo/core-foundation-rs@a119788) even more version bumps
- [`6574b12`](servo/core-foundation-rs@6574b12) more version bumps!
- [`0718126`](servo/core-foundation-rs@0718126) Auto merge of [#350](https://github-redirect.dependabot.com/servo/core-foundation-rs/issues/350) - lqf96:fix-deprecated-usage, r=jdm
- [`83b6f5d`](servo/core-foundation-rs@83b6f5d) Use zero-initialized array in CFURL::to_path
- [`3126f15`](servo/core-foundation-rs@3126f15) adjust test
- [`d3a097f`](servo/core-foundation-rs@d3a097f) Use dyn for dynamic dispatch
- [`e438fc5`](servo/core-foundation-rs@e438fc5) Use ? instead of try macro
- [`727837f`](servo/core-foundation-rs@727837f) Use MaybeUninit instead of mem::uninitialized
- [`e7f687e`](servo/core-foundation-rs@e7f687e) moar version bumps
- Additional commits viewable in [compare view](servo/core-foundation-rs@core-foundation-v0.6.2...core-foundation-v0.7.0)
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Update cargo, rls, books.

## nomicon

1 commits in 58e36e0e08dec5a379ac568827c058e25990d6cd..041c46e692a2592853aeca132c8dfe8eb5a79a9e
2019-10-30 08:14:24 -0500 to 2019-11-20 16:46:45 +0100
- Update unsafe-code-guidelines link (rust-lang/nomicon#175)

## cargo

15 commits in 8280633db680dec5bfe1de25156d1a1d53e6d190..750cb1482e4d0e74822cded7ab8b3c677ed8b041
2019-11-11 23:17:05 +0000 to 2019-11-23 23:06:36 +0000
- Some random comments and docstrings. (rust-lang/cargo#7625)
- Add value OUT_DIR to build-script-executed JSON message (rust-lang/cargo#7622)
- Update documentation for custom target dependencies. (rust-lang/cargo#7623)
- Document private items for binary crates by default (rust-lang/cargo#7593)
- Extend documentation on security concerns of crate names in a registry. (rust-lang/cargo#7616)
- Stabilize install-upgrade. (rust-lang/cargo#7560)
- Turn the new lock file format on by default (rust-lang/cargo#7579)
- bump im-rc version (rust-lang/cargo#7609)
- Ignore file lock errors if unsupported, on Windows (rust-lang/cargo#7602)
- Add hack for fwdansi change. (rust-lang/cargo#7607)
- Document Cargo's JSON output. (rust-lang/cargo#7595)
- Remove "cargo login" from user input when asking for login token. (rust-lang/cargo#7588)
- Fix all Clippy suggestions (but not add it to CI 🙃) (rust-lang/cargo#7574)
- Add kind/platform info to `cargo metadata` (rust-lang/cargo#7132)
- Update core-foundation requirement from 0.6.0 to 0.7.0 (rust-lang/cargo#7585)

## reference

2 commits in 45558c4..9e843ae
2019-11-08 14:47:35 +0100 to 2019-11-24 17:44:04 +0100
- Minor never type additions. (rust-lang/reference#723)
- Update associated-items.md.  "it"->is (rust-lang/reference#721)

## book

3 commits in e79dd62aa63396714278d484d91d48826737f47f..81ebaa2a3f88d4d106516c489682e64cacba4f60
2019-10-30 07:33:12 -0500 to 2019-11-15 08:30:04 -0800
- small fix ch04-03 & code block typo ch07-02 (rust-lang/book#2138)
- Adapt content of Chapter 16.3 in order to be consistent with improved compiler message (rust-lang/book#1779)
- [Rust 1.35] Remove FnBox and use builtin impl FnOnce for Box<FnOnce()> instead. (rust-lang/book#1906)

## rls

3 commits in 5db91c7b94ca81eead6b25bcf6196b869a44ece0..9ec2b8cb57c87517bcb506ac302eae339ffa2025
2019-10-30 16:04:39 +0100 to 2019-11-24 23:16:11 +0100
- Fix test for latest nightly. (rust-lang/rls#1595)
- doc: contributing: Remove outdated LSP extension (rust-lang/rls#1594)
- Update cargo. (rust-lang/rls#1591)

## rust-by-example

1 commits in dcee312c66267eb5a2f6f1561354003950e29105..4835e025826729827a94fdeb7cb85fed288d08bb
2019-10-31 11:26:53 -0300 to 2019-11-14 09:20:43 -0300
- crates: fix suggested value for --crate-type flag (rust-lang/rust-by-example#1292)

## edition-guide

1 commits in f553fb26c60c4623ea88a1cfe731eafe0643ce34..6601cab4666596494a569f94aa63b7b3230e9769
2019-10-30 08:27:42 -0500 to 2019-11-22 12:08:58 -0500
- Remove final nursery reference