chore(deps): Bump serde_yaml from 0.9.17 to 0.9.19 (#592)

Bumps [serde_yaml](https://github.com/dtolnay/serde-yaml) from 0.9.17 to
0.9.19.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/serde-yaml/releases">serde_yaml's
releases</a>.</em></p>
<blockquote>
<h2>0.9.19</h2>
<ul>
<li>Fix message duplication between serde_yaml::Error's
<code>Display</code> and <code>source()</code> (<a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/359">#359</a>,
<a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/360">#360</a>)</li>
</ul>
<h2>0.9.18</h2>
<ul>
<li>Add support for emitting Unicode characters over codepoint U+FFFF
(<a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/356">#356</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="4e1cbd8d2f"><code>4e1cbd8</code></a>
Release 0.9.19</li>
<li><a
href="f351fc7a12"><code>f351fc7</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/360">#360</a>
from dtolnay/errorsource</li>
<li><a
href="f27e4c5da3"><code>f27e4c5</code></a>
Fix message duplication between error Display and source()</li>
<li><a
href="fc039c6357"><code>fc039c6</code></a>
Refer to std::error::Error trait as StdError</li>
<li><a
href="7f1db12843"><code>7f1db12</code></a>
Release 0.9.18</li>
<li><a
href="248d6de914"><code>248d6de</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/358">#358</a>
from dtolnay/unicode</li>
<li><a
href="779f01676b"><code>779f016</code></a>
Update U+1F389 test</li>
<li><a
href="12b48b5547"><code>12b48b5</code></a>
Pull in Unicode high codepoints fix from unsafe-libyaml 0.2.7</li>
<li><a
href="b6f69579df"><code>b6f6957</code></a>
Add test of Unicode larger than U+FFFF</li>
<li><a
href="eac69a2a0b"><code>eac69a2</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/dtolnay/serde-yaml/issues/357">#357</a>
from dtolnay/stringescape</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/serde-yaml/compare/0.9.17...0.9.19">compare
view</a></li>
</ul>
</details>
<br />


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Cargo.lock

@@ -2176,9 +2176,9 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.9.17"
+version = "0.9.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fb06d4b6cdaef0e0c51fa881acb721bed3c924cfaa71d9c94a3b771dfdf6567"
+checksum = "f82e6c8c047aa50a7328632d067bcae6ef38772a79e28daf32f735e0e4f3dd10"
 dependencies = [
  "indexmap",
  "itoa",
@@ -2694,9 +2694,9 @@ checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
 
 [[package]]
 name = "unsafe-libyaml"
-version = "0.2.5"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc7ed8ba44ca06be78ea1ad2c3682a43349126c8818054231ee6f4748012aed2"
+checksum = "ad2024452afd3874bf539695e04af6732ba06517424dbf958fdb16a01f3bef6c"
 
 [[package]]
 name = "url"