Auto merge of #26552 - servo:dependabot/cargo/arrayvec-0.4.12, r=jdm

Bump arrayvec from 0.4.6 to 0.4.12

Bumps [arrayvec](https://github.com/bluss/arrayvec) from 0.4.6 to 0.4.12.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/bluss/arrayvec/blob/master/CHANGELOG.md">arrayvec's changelog</a>.</em></p>
<blockquote>
<ul>
<li>
<p>0.4.12</p>
<ul>
<li>Use raw pointers instead of <code>get_unchecked_mut</code> where the target may be
uninitialized everywhere relevant in the ArrayVec implementation.</li>
</ul>
</li>
<li>
<p>0.5.0</p>
<ul>
<li>Use <code>MaybeUninit</code> (now unconditionally) in the implementation of
<code>ArrayVec</code></li>
<li>Use <code>MaybeUninit</code> (now unconditionally) in the implementation of
<code>ArrayString</code></li>
<li>The crate feature for serde serialization is now named <code>serde</code>.</li>
<li>Updated the <code>Array</code> trait interface, and it is now easier to use for
users outside the crate.</li>
<li>Add <code>FromStr</code> impl for <code>ArrayString</code> by <a href="https://github.com/despawnerer">@despawnerer</a></li>
<li>Add method <code>try_extend_from_slice</code> to <code>ArrayVec</code>, which is always
effecient by <a href="https://github.com/Thomasdezeeuw">@Thomasdezeeuw</a>.</li>
<li>Add method <code>remaining_capacity</code> by <a href="https://github.com/Thomasdezeeuw">@Thomasdezeeuw</a></li>
<li>Improve performance of the <code>extend</code> method.</li>
<li>The index type of zero capacity vectors is now itself zero size, by
<a href="https://github.com/clarfon">@clarfon</a></li>
<li>Use <code>drop_in_place</code> for truncate and clear methods. This affects drop order
and resume from panic during drop.</li>
<li>Use Rust 2018 edition for the implementation</li>
<li>Require Rust 1.36 or later, for the unconditional <code>MaybeUninit</code>
improvements.</li>
</ul>
</li>
<li>
<p>0.4.11</p>
<ul>
<li>In Rust 1.36 or later, use newly stable <code>MaybeUninit</code>. This extends the
soundness work introduced in 0.4.9, we are finally able to use this in
stable. We use feature detection (build script) to enable this at build
time.</li>
</ul>
</li>
<li>
<p>0.4.10</p>
<ul>
<li>Use <code>repr(C)</code> in the <code>union</code> version that was introduced in 0.4.9, to
allay some soundness concerns.</li>
</ul>
</li>
<li>
<p>0.4.9</p>
<ul>
<li>Use <code>union</code> in the implementation on when this is detected to be supported
(nightly only for now). This is a better solution for treating uninitialized
regions correctly, and we'll use it in stable Rust as soon as we are able.
When this is enabled, the <code>ArrayVec</code> has no space overhead in its memory
layout, although the size of the vec should not be relied upon. (See <a href="https://github-redirect.dependabot.com/bluss/arrayvec/pull/114">#114</a>)</li>
<li><code>ArrayString</code> updated to not use uninitialized memory, it instead zeros its
backing array. This will be refined in the next version, since we
need to make changes to the user visible API.</li>
<li>The <code>use_union</code> feature now does nothing (like its documentation foretold).</li>
</ul>
</li>
</ul>
</tr></table> ... (truncated)
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="f88c62e59f"><code>f88c62e</code></a> 0.4.12</li>
<li><a href="79e0908e26"><code>79e0908</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/bluss/arrayvec/issues/139">#139</a> from bluss/uninit-soundness-0.4</li>
<li><a href="91a7f7aa54"><code>91a7f7a</code></a> FIX: Replace uses of &lt;[T]&gt;::get_unchecked_mut with raw pointer accessor</li>
<li><a href="9792502792"><code>9792502</code></a> 0.4.11</li>
<li><a href="c155b400eb"><code>c155b40</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/bluss/arrayvec/issues/127">#127</a> from bluss/stable-maybe-uninit</li>
<li><a href="93220e55ae"><code>93220e5</code></a> TEST: Update tests for new MaybeUninit usage</li>
<li><a href="b56c3b78d0"><code>b56c3b7</code></a> FEAT: Use stable MaybeUninit when we can (feature detected)</li>
<li><a href="21661facf8"><code>21661fa</code></a> 0.4.10</li>
<li><a href="06930d27ce"><code>06930d2</code></a> FIX: Remove unused Copy/Clone for MaybeUninit</li>
<li><a href="85d9a06a62"><code>85d9a06</code></a> FIX: Use repr(C) MaybeUninit after discussion with RalfJung</li>
<li>Additional commits viewable in <a href="https://github.com/bluss/arrayvec/compare/0.4.6...0.4.12">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -140,9 +140,9 @@ checksum = "0d382e583f07208808f6b1249e60848879ba3543f57c32277bf52d69c2f0f0ee"
 
 [[package]]
 name = "arrayvec"
-version = "0.4.6"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f0ef4a9820019a0c91d918918c93dc71d469f581a49b47ddc1d285d4270bbe2"
+checksum = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
 dependencies = [
  "nodrop",
 ]
@@ -2625,7 +2625,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7371aa3c98fad60de2d9b517e2e1ed45593c32b0c77249310fa507749a2a318b"
 dependencies = [
- "arrayvec 0.4.6",
+ "arrayvec 0.4.12",
  "byteorder",
  "num-traits",
 ]
@@ -3187,7 +3187,7 @@ version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69589b8844c0b3745cc031a35b62bc33b0fb9e5ba7613756d802c52861dcdb4c"
 dependencies = [
- "arrayvec 0.4.6",
+ "arrayvec 0.4.12",
  "euclid",
  "num-traits",
 ]
@@ -4527,7 +4527,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8eb11f5b0a98c8eca2fb1483f42646d8c340e83e46ab416f8a063a0fd0eeb20"
 dependencies = [
  "approx",
- "arrayvec 0.4.6",
+ "arrayvec 0.4.12",
  "ordered-float",
  "stb_truetype",
 ]