Bump proc-macro2 from 1.0.49 to 1.0.50 (#2541)

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 1.0.49 to 1.0.50.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dtolnay/proc-macro2/releases">proc-macro2's releases</a>.</em></p>
<blockquote>
<h2>1.0.50</h2>
<ul>
<li>Implement Hash for proc_macro2::LineColumn (<a href="https://github-redirect.dependabot.com/dtolnay/proc-macro2/issues/362">#362</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="94c7519134"><code>94c7519</code></a> Release 1.0.50</li>
<li><a href="f01da432fa"><code>f01da43</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/dtolnay/proc-macro2/issues/362">#362</a> from dtolnay/hashlinecolumn</li>
<li><a href="d4c564b836"><code>d4c564b</code></a> Implement Hash for LineColumn</li>
<li><a href="92a029553b"><code>92a0295</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/dtolnay/proc-macro2/issues/361">#361</a> from dtolnay/linecolumn</li>
<li><a href="a4be9825bc"><code>a4be982</code></a> Deduplicate implementations of LineColumn</li>
<li><a href="9924b79370"><code>9924b79</code></a> Prevent actions duplication on noop merge commits</li>
<li><a href="37e89e109c"><code>37e89e1</code></a> Sync license text with rust-lang repos</li>
<li><a href="8779f4c658"><code>8779f4c</code></a> Update ui test suite to nightly-2022-12-30</li>
<li>See full diff in <a href="https://github.com/dtolnay/proc-macro2/compare/1.0.49...1.0.50">compare view</a></li>
</ul>
</details>
<br />


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</details>

Cargo.lock

@@ -2668,9 +2668,9 @@ checksum = "dc375e1527247fe1a97d8b7156678dfe7c1af2fc075c9a4db3690ecd2a148068"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.49"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57a8eca9f9c4ffde41714334dee777596264c7825420f521abc92b5b5deb63a5"
+checksum = "6ef7d57beacfaf2d8aee5937dab7b7f28de3cb8b1828479bb5de2a7106f2bae2"
 dependencies = [
  "unicode-ident",
 ]