Bumps [once_cell](https://github.com/matklad/once_cell) from 1.12.0 to 1.13.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/matklad/once_cell/blob/master/CHANGELOG.md">once_cell's changelog</a>.</em></p>
<blockquote>
<h2>1.13.0</h2>
<ul>
<li>Add <code>Lazy::get</code>, similar to <code>OnceCell::get</code>.</li>
</ul>
<h2>1.12.1</h2>
<ul>
<li>Remove incorrect <code>debug_assert</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="eda22cec55"><code>eda22ce</code></a> Merge <a href="https://github-redirect.dependabot.com/matklad/once_cell/issues/183">#183</a></li>
<li><a href="2b0e3e5d83"><code>2b0e3e5</code></a> Publish 1.13.0</li>
<li><a href="61e27f9ff5"><code>61e27f9</code></a> Add a <code>Lazy::get</code> function, similar to <code>OnceCell::get</code></li>
<li><a href="2be67cc0e3"><code>2be67cc</code></a> Merge <a href="https://github-redirect.dependabot.com/matklad/once_cell/issues/187">#187</a></li>
<li><a href="c2ce5bd9a4"><code>c2ce5bd</code></a> remove incorrect debug assert</li>
<li><a href="2cdfc1e0a9"><code>2cdfc1e</code></a> Merge <a href="https://github-redirect.dependabot.com/matklad/once_cell/issues/184">#184</a></li>
<li><a href="b7839edeb6"><code>b7839ed</code></a> reduce iteration counts for Miri</li>
<li><a href="c1a3827bd5"><code>c1a3827</code></a> Miri has gained some more features</li>
<li><a href="485aaa83f3"><code>485aaa8</code></a> Merge <a href="https://github-redirect.dependabot.com/matklad/once_cell/issues/180">#180</a></li>
<li><a href="a36132d451"><code>a36132d</code></a> Fix comment of not new but get_mut</li>
<li>Additional commits viewable in <a href="https://github.com/matklad/once_cell/compare/v1.12.0...v1.13.0">compare view</a></li>
</ul>
</details>
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