Bump thiserror from 1.0.48 to 1.0.49 (#4173)

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 1.0.48 to
1.0.49.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/thiserror/releases">thiserror's
releases</a>.</em></p>
<blockquote>
<h2>1.0.49</h2>
<ul>
<li>Access libcore types through <code>::core</code> in generated code
(<a
href="https://redirect.github.com/dtolnay/thiserror/issues/255">#255</a>,
thanks <a
href="https://github.com/mina86"><code>@​mina86</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/thiserror/commit/54465b7475517e10735f699e31d81a1d511baaeb"><code>54465b7</code></a>
Release 1.0.49</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/79704adca9db79dd9a9588c61f09652bf13f0ac6"><code>79704ad</code></a>
Merge pull request 255 from mina86/a</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/5bfbdaebe32cbe802fca45e408ece6669c341c74"><code>5bfbdae</code></a>
Test docs.rs documentation build in CI</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/f0f303a7bac9e65f9a0664141f58da9b78f21927"><code>f0f303a</code></a>
Prefer core crate in macro expansions</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/435c7c819c11cc06358f710b52ef148ea24fad79"><code>435c7c8</code></a>
Update actions/checkout@v3 -&gt; v4</li>
<li>See full diff in <a
href="https://github.com/dtolnay/thiserror/compare/1.0.48...1.0.49">compare
view</a></li>
</ul>
</details>
<br />


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