[chore(cargo)](deps): Bump semver from 1.0.17 to 1.0.18 (#199)

Bumps [semver](https://github.com/dtolnay/semver) from 1.0.17 to 1.0.18.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/semver/releases">semver's
releases</a>.</em></p>
<blockquote>
<h2>1.0.18</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/semver/commit/c1fcafc1862753d93ff0cbc0c7a928cedb1a96d1"><code>c1fcafc</code></a>
Release 1.0.18</li>
<li><a
href="https://github.com/dtolnay/semver/commit/087f787bc4deac6498ba3862ae97810ee5b82c2e"><code>087f787</code></a>
Opt in to generate-link-to-definition when building on docs.rs</li>
<li><a
href="https://github.com/dtolnay/semver/commit/9c9eb88abcd77bf1ef7f44f6978a632991c165da"><code>9c9eb88</code></a>
Add CI job using minimal-versions</li>
<li><a
href="https://github.com/dtolnay/semver/commit/45e10998153f23605e35b480acc7fd5f3c1b8659"><code>45e1099</code></a>
Remove .clippy.toml in favor of respecting rust-version from
Cargo.toml</li>
<li>See full diff in <a
href="https://github.com/dtolnay/semver/compare/1.0.17...1.0.18">compare
view</a></li>
</ul>
</details>
<br />


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