Auto merge of #28071 - servo:dependabot/cargo/futures-sink-0.3.12, r=jdm

Bump futures-sink from 0.3.8 to 0.3.12

Bumps [futures-sink](https://github.com/rust-lang/futures-rs) from 0.3.8 to 0.3.12.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/rust-lang/futures-rs/releases">futures-sink's releases</a>.</em></p>
<blockquote>
<h2>0.3.12</h2>
<ul>
<li>Fixed <code>Unpin</code> impl of <code>future::{MaybeDone, TryMaybeDone}</code> where trait bounds were accidentally added in 0.3.9. (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2317">#2317</a>)</li>
</ul>
<h2>0.3.11</h2>
<ul>
<li>Fixed heap buffer overflow in <code>AsyncReadExt::{read_to_end, read_to_string}</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2314">#2314</a>)</li>
</ul>
<h2>0.3.10</h2>
<ul>
<li>Fixed type-inference in <code>sink::unfold</code> by specifying more of its types (breaking change -- see <a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2311">#2311</a>)</li>
</ul>
<h2>0.3.9</h2>
<ul>
<li>Significantly improved compile time when <code>async-await</code> crate feature is disabled (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2273">#2273</a>)</li>
<li>Added <code>stream::repeat_with</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2279">#2279</a>)</li>
<li>Added <code>StreamExt::unzip</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2263">#2263</a>)</li>
<li>Added <code>sink::unfold</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2268">#2268</a>)</li>
<li>Added <code>SinkExt::feed</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2155">#2155</a>)</li>
<li>Implemented <code>FusedFuture</code> for <code>oneshot::Receiver</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2300">#2300</a>)</li>
<li>Implemented <code>Clone</code> for <code>sink::With</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2290">#2290</a>)</li>
<li>Re-exported <code>MapOkOrElse</code>, <code>MapInto</code>, <code>OkInto</code>, <code>TryFlatten</code>, <code>WriteAllVectored</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2275">#2275</a>)</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-sink's changelog</a>.</em></p>
<blockquote>
<h1>0.3.12 - 2021-01-15</h1>
<ul>
<li>Fixed <code>Unpin</code> impl of <code>future::{MaybeDone, TryMaybeDone}</code> where trait bounds were accidentally added in 0.3.9. (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2317">#2317</a>)</li>
</ul>
<h1>0.3.11 - 2021-01-14</h1>
<ul>
<li>Fixed heap buffer overflow in <code>AsyncReadExt::{read_to_end, read_to_string}</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2314">#2314</a>)</li>
</ul>
<h1>0.3.10 - 2021-01-13</h1>
<ul>
<li>Fixed type-inference in <code>sink::unfold</code> by specifying more of its types (breaking change -- see <a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2311">#2311</a>)</li>
</ul>
<h1>0.3.9 - 2021-01-08</h1>
<ul>
<li>Significantly improved compile time when <code>async-await</code> crate feature is disabled (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2273">#2273</a>)</li>
<li>Added <code>stream::repeat_with</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2279">#2279</a>)</li>
<li>Added <code>StreamExt::unzip</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2263">#2263</a>)</li>
<li>Added <code>sink::unfold</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2268">#2268</a>)</li>
<li>Added <code>SinkExt::feed</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2155">#2155</a>)</li>
<li>Implemented <code>FusedFuture</code> for <code>oneshot::Receiver</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2300">#2300</a>)</li>
<li>Implemented <code>Clone</code> for <code>sink::With</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2290">#2290</a>)</li>
<li>Re-exported <code>MapOkOrElse</code>, <code>MapInto</code>, <code>OkInto</code>, <code>TryFlatten</code>, <code>WriteAllVectored</code> (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2275">#2275</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="1d53a29ec1"><code>1d53a29</code></a> Release 0.3.12</li>
<li><a href="855541d5c1"><code>855541d</code></a> Remove unneeded fields from examples/*/Cargo.toml (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2321">#2321</a>)</li>
<li><a href="a9161a937b"><code>a9161a9</code></a> Fix Unpin impl of (Try)MaybeDone (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2317">#2317</a>)</li>
<li><a href="7f509b523d"><code>7f509b5</code></a> Release 0.3.11</li>
<li><a href="b38805e445"><code>b38805e</code></a> Fix handling of malicious readers in read_to_end (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2314">#2314</a>)</li>
<li><a href="6f948ac6f0"><code>6f948ac</code></a> Fix changelog release date</li>
<li><a href="60b02d2548"><code>60b02d2</code></a> Release 0.3.10</li>
<li><a href="b008f34574"><code>b008f34</code></a> Fix type-inference in sink::unfold() by specifying more of its types (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2311">#2311</a>)</li>
<li><a href="1db2b4ed0b"><code>1db2b4e</code></a> perf: Avoid an Option in the <code>Map*</code> futures (<a href="https://github-redirect.dependabot.com/rust-lang/futures-rs/issues/2306">#2306</a>)</li>
<li><a href="1661badd94"><code>1661bad</code></a> Release 0.3.9</li>
<li>Additional commits viewable in <a href="https://github.com/rust-lang/futures-rs/compare/0.3.8...0.3.12">compare view</a></li>
</ul>
</details>
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Cargo.lock

@@ -1848,9 +1848,9 @@ dependencies = [
 
 [[package]]
 name = "futures-sink"
-version = "0.3.8"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f878195a49cee50e006b02b93cf7e0a95a38ac7b776b4c4d9cc1207cd20fcb3d"
+checksum = "caf5c69029bda2e743fddd0582d1083951d65cc9539aebf8812f36c3491342d6"
 
 [[package]]
 name = "futures-task"