Auto merge of #28817 - servo:dependabot/cargo/uluru-2.2.0, r=jdm

Bump uluru from 2.1.1 to 2.2.0

Bumps [uluru](https://github.com/servo/uluru) from 2.1.1 to 2.2.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/servo/uluru/releases">uluru's releases</a>.</em></p>
<blockquote>
<h2>v2.2.0</h2>
<ul>
<li>New <code>is_empty</code> method (<a href="https://github-redirect.dependabot.com/servo/uluru/issues/21">#21</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="d38a7fc44c"><code>d38a7fc</code></a> Version 2.2.0</li>
<li><a href="f3c8a4c2c6"><code>f3c8a4c</code></a> Use Rust 2018 edition</li>
<li><a href="74b3bd73e3"><code>74b3bd7</code></a> Minor doc fixes</li>
<li><a href="69826fd2b4"><code>69826fd</code></a> Test both possible outcomes</li>
<li><a href="9d3ee51cdd"><code>9d3ee51</code></a> Use <code>cargo diet</code> to possibly reduce the crate size</li>
<li><a href="c9b40a6c42"><code>c9b40a6</code></a> Add a <code>len</code> test to test the <code>len</code> method</li>
<li><a href="0b8a5b939f"><code>0b8a5b9</code></a> The <code>empty</code> test now uses the <code>is_empty</code> method</li>
<li><a href="2ddae4740b"><code>2ddae47</code></a> Add the <code>is_empty</code> method</li>
<li>See full diff in <a href="https://github.com/servo/uluru/compare/v2.1.1...v2.2.0">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -6886,9 +6886,9 @@ checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
 
 [[package]]
 name = "uluru"
-version = "2.1.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce7967da538013500fa504ce61af688d6a310e6dea6985c71f3c6be37e2a55c7"
+checksum = "308dcc9d947b227796f851adb99936fb060681a89c002c9c1928404a3b6c2d72"
 dependencies = [
  "arrayvec 0.7.1",
 ]