[chore(cargo)](deps): Bump async-trait from 0.1.71 to 0.1.72 (#213)

Bumps [async-trait](https://github.com/dtolnay/async-trait) from 0.1.71
to 0.1.72.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/async-trait/releases">async-trait's
releases</a>.</em></p>
<blockquote>
<h2>0.1.72</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/async-trait/commit/a01e5d4fb61f67474e5225781395151043c44132"><code>a01e5d4</code></a>
Release 0.1.72</li>
<li><a
href="https://github.com/dtolnay/async-trait/commit/a38d35acfb32d44b8136dc550e3e9fbf8b671b5e"><code>a38d35a</code></a>
Opt in to generate-link-to-definition when building on docs.rs</li>
<li><a
href="https://github.com/dtolnay/async-trait/commit/036a373ab48cd32e0543c6d06d5e26629f8be3d4"><code>036a373</code></a>
Update ui tests with 2021-edition diagnostics</li>
<li><a
href="https://github.com/dtolnay/async-trait/commit/059aafd8cc369b42185999baf9e907d491d28e76"><code>059aafd</code></a>
Update to 2021 edition</li>
<li>See full diff in <a
href="https://github.com/dtolnay/async-trait/compare/0.1.71...0.1.72">compare
view</a></li>
</ul>
</details>
<br />


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