Auto merge of #26302 - servo:dependabot/cargo/crossbeam-channel-0.4.2, r=jdm
Auto merge of #26302 - servo:dependabot/cargo/crossbeam-channel-0.4.2, r=jdm

Bump crossbeam-channel from 0.4.0 to 0.4.2

Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.4.0 to 0.4.2.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/crossbeam-rs/crossbeam/blob/v0.4.2/CHANGELOG.md">crossbeam-channel's changelog</a>.</em></p>
<blockquote>
<h2>[0.4.2] - 2018-06-12</h2>
<h3>Added</h3>
<ul>
<li>Expose the <code>Pointer</code> trait.</li>
<li>Warn missing docs and missing debug impls.</li>
</ul>
<h2>Changed</h2>
<ul>
<li>Update <code>crossbeam-utils</code> to 0.4.</li>
</ul>
<h2>[0.4.1] - 2018-03-20</h2>
<h3>Added</h3>
<ul>
<li>Add <code>Debug</code> impls for <code>Collector</code>, <code>Handle</code>, and <code>Guard</code>.</li>
<li>Add <code>load_consume</code> to <code>Atomic</code>.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>Rename <code>Collector::handle</code> to <code>Collector::register</code>.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Remove the <code>Send</code> implementation for <code>Handle</code> (this was a bug). Only
<code>Collector</code>s can be shared among multiple threads, while <code>Handle</code>s and
<code>Guard</code>s must stay within the thread in which they were created.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/76f6b7cac1e5e827279c05acdb8a2739f164a54f"><code>76f6b7c</code></a> Bump to v0.4.2</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/185d31dd766ca5343a828b424eb3efbd22203b49"><code>185d31d</code></a> Update crossbeam-utils</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/c8428c86541238f3e122a9d3076bddda733a4e7d"><code>c8428c8</code></a> Remove the Garbage struct (closes <a href="https://github-redirect.dependabot.com/crossbeam-rs/crossbeam/issues/12">#12</a>) (<a href="https://github-redirect.dependabot.com/crossbeam-rs/crossbeam/issues/77">#77</a>)</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/389f77a05a34b66a08b2c1a7eb73f5ec08ea13e6"><code>389f77a</code></a> Rename strict_gc into sanitize (<a href="https://github-redirect.dependabot.com/crossbeam-rs/crossbeam/issues/78">#78</a>)</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/eed82cc8c3a3591d682783c000565df9cb961b2e"><code>eed82cc</code></a> Rename Pointer::from/into_data into Pointer::from/into_usize</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/5259806e2bdc3b0e2893c6cdeeee1a2ef92221f4"><code>5259806</code></a> Warn missing docs and missing debug impls</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/4061bae6093e0093cfcae9c04ec8874b3306579e"><code>4061bae</code></a> Expose the Pointer trait as public</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/3179e799f384816a0a9f2a3da82a147850e14d38"><code>3179e79</code></a> Bump version to 0.4.1</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/1945247833851cbe4dbb1132fc8f421c8199b581"><code>1945247</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/crossbeam-rs/crossbeam/issues/72">#72</a> from Amanieu/load_consume</li>
<li><a href="https://github.com/crossbeam-rs/crossbeam/commit/e7a5dae6469f779ac95951e76f0fc5393c29346d"><code>e7a5dae</code></a> Fix non-compiling tests</li>
<li>Additional commits viewable in <a href="https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-channel-0.4.0...v0.4.2">compare view</a></li>
</ul>
</details>
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