Auto merge of #26842 - servo:dependabot/cargo/futures-channel-0.3.5, r=jdm

build(deps): bump futures-channel from 0.3.4 to 0.3.5

Bumps [futures-channel](https://github.com/rust-lang/futures-rs) from 0.3.4 to 0.3.5.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/rust-lang/futures-rs/releases">futures-channel's releases</a>.</em></p>
<blockquote>
<h2>0.3.5</h2>
<ul>
<li>Added <code>StreamExt::flat_map</code>.</li>
<li>Added <code>StreamExt::ready_chunks</code>.</li>
<li>Added <code>*_unpin</code> methods to <code>SinkExt</code>.</li>
<li>Added a <code>cancellation()</code> future to <code>oneshot::Sender</code>.</li>
<li>Added <code>reunite</code> method to <code>ReadHalf</code> and <code>WriteHalf</code>.</li>
<li>Added <code>Extend</code> implementations for <code>Futures(Un)Ordered</code> and <code>SelectAll</code>.</li>
<li>Added support for reexporting the <code>join!</code> and <code>select!</code> macros.</li>
<li>Added <code>no_std</code> support for the <code>pending!</code> and <code>poll!</code> macros.</li>
<li>Added <code>Send</code> and <code>Sync</code> support for <code>AssertUnmoved</code>.</li>
<li>Fixed a bug where <code>Shared</code> wasn't relinquishing control to the executor.</li>
<li>Removed the <code>Send</code> bound on the output of <code>RemoteHandle</code>.</li>
<li>Relaxed bounds on <code>FuturesUnordered</code>.</li>
<li>Reorganized internal tests to work under different <code>--feature</code>s.</li>
<li>Reorganized the bounds on <code>StreamExt::forward</code>.</li>
<li>Removed and replaced a large amount of internal <code>unsafe</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md">futures-channel's changelog</a>.</em></p>
<blockquote>
<h1>0.3.5 - 2020-05-08</h1>
<ul>
<li>Added <code>StreamExt::flat_map</code>.</li>
<li>Added <code>StreamExt::ready_chunks</code>.</li>
<li>Added <code>*_unpin</code> methods to <code>SinkExt</code>.</li>
<li>Added a <code>cancellation()</code> future to <code>oneshot::Sender</code>.</li>
<li>Added <code>reunite</code> method to <code>ReadHalf</code> and <code>WriteHalf</code>.</li>
<li>Added <code>Extend</code> implementations for <code>Futures(Un)Ordered</code> and <code>SelectAll</code>.</li>
<li>Added support for reexporting the <code>join!</code> and <code>select!</code> macros.</li>
<li>Added <code>no_std</code> support for the <code>pending!</code> and <code>poll!</code> macros.</li>
<li>Added <code>Send</code> and <code>Sync</code> support for <code>AssertUnmoved</code>.</li>
<li>Fixed a bug where <code>Shared</code> wasn't relinquishing control to the executor.</li>
<li>Removed the <code>Send</code> bound on the output of <code>RemoteHandle</code>.</li>
<li>Relaxed bounds on <code>FuturesUnordered</code>.</li>
<li>Reorganized internal tests to work under different <code>--feature</code>s.</li>
<li>Reorganized the bounds on <code>StreamExt::forward</code>.</li>
<li>Removed and replaced a large amount of internal <code>unsafe</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="4ceafb384c"><code>4ceafb3</code></a> Stage 0.3.5</li>
<li><a href="5b91728e10"><code>5b91728</code></a> Drop unneeded Send/Sync bound from AssertUnmoved</li>
<li><a href="4b930bb470"><code>4b930bb</code></a> Implement Send + Sync for AssertUnmoved</li>
<li><a href="3bf5ac99e9"><code>3bf5ac9</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2128">#2128</a> from Diggsey/snip</li>
<li><a href="1b44548be7"><code>1b44548</code></a> Merge branch 'master' into snip</li>
<li><a href="32005e3f74"><code>32005e3</code></a> fix: Shared must relinquish control to the executor if repolled</li>
<li><a href="dc06edaf54"><code>dc06eda</code></a> Update pin-utils to 0.1</li>
<li><a href="dc00793b38"><code>dc00793</code></a> Make ready and lazy's panic messages easy to understand</li>
<li><a href="127b244ecd"><code>127b244</code></a> Allow pending! and poll! in no_std</li>
<li><a href="dfc6673946"><code>dfc6673</code></a> Update futures-util/src/future/future/flatten.rs</li>
<li>Additional commits viewable in <a href="https://github.com/rust-lang/futures-rs/compare/0.3.4...0.3.5">compare view</a></li>
</ul>
</details>
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Cargo.lock

@@ -1584,9 +1584,9 @@ checksum = "45dc39533a6cae6da2b56da48edae506bb767ec07370f86f70fc062e9d435869"
 
 [[package]]
 name = "futures-channel"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c77d04ce8edd9cb903932b608268b3fffec4163dc053b3b402bf47eac1f1a8"
+checksum = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
 dependencies = [
  "futures-core",
 ]