chore(deps): Bump serde from 1.0.185 to 1.0.188 (#81)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.185 to 1.0.188.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/serde-rs/serde/releases">serde's releases</a>.</em></p>
<blockquote>
<h2>v1.0.188</h2>
<ul>
<li>Fix <em>&quot;failed to parse manifest&quot;</em> error when building serde using a Cargo version between 1.45 and 1.50 (<a href="https://redirect.github.com/serde-rs/serde/issues/2603">#2603</a>)</li>
</ul>
<h2>v1.0.187</h2>
<ul>
<li>Remove support for Emscripten targets on rustc older than 1.40 (<a href="https://redirect.github.com/serde-rs/serde/issues/2600">#2600</a>)</li>
</ul>
<h2>v1.0.186</h2>
<ul>
<li>Disallow incompatible versions of <code>serde_derive</code> and <code>serde</code> in the dependency graph (<a href="https://redirect.github.com/serde-rs/serde/issues/2588">#2588</a>, thanks <a href="https://github.com/soqb"><code>@​soqb</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/serde-rs/serde/commit/dad15b9fd0bef97b7a7c90a8a165b6ffbc682cae"><code>dad15b9</code></a> Release 1.0.188</li>
<li><a href="https://github.com/serde-rs/serde/commit/d89c19f903cd01b1d2ac9b923b5d0f3dd6b806fe"><code>d89c19f</code></a> Revert &quot;Adopt new Cargo feature resolver&quot;</li>
<li><a href="https://github.com/serde-rs/serde/commit/146dc0fad527e73813154334960c9c41f00f5cac"><code>146dc0f</code></a> Release 1.0.187</li>
<li><a href="https://github.com/serde-rs/serde/commit/d26852deef966082650e1b9463b95263e81d1130"><code>d26852d</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2602">#2602</a> from dtolnay/resolver</li>
<li><a href="https://github.com/serde-rs/serde/commit/e1c27243b20470bdbfcbf19116e6a13ab87e073d"><code>e1c2724</code></a> Adopt new Cargo feature resolver</li>
<li><a href="https://github.com/serde-rs/serde/commit/dbbfe7abe24be322355e03a3580fe0c1f570e32b"><code>dbbfe7a</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2600">#2600</a> from dtolnay/oldemscripten</li>
<li><a href="https://github.com/serde-rs/serde/commit/dc24d12ce0cc2d401178d2764f77d38e2d870b94"><code>dc24d12</code></a> Clean up all usage of serde_if_integer128</li>
<li><a href="https://github.com/serde-rs/serde/commit/4e7533e8726f85f0b16fecfe57200c8335c1ec90"><code>4e7533e</code></a> Remove support for emscripten targets on rustc older than 1.40</li>
<li><a href="https://github.com/serde-rs/serde/commit/5d036515ed9d73ce0e2aa2eb96ec91749ab8e7ab"><code>5d03651</code></a> Release 1.0.186</li>
<li><a href="https://github.com/serde-rs/serde/commit/a741293886412be8d75d8898c430cd54e73d92c4"><code>a741293</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2599">#2599</a> from dtolnay/encodeutf8</li>
<li>Additional commits viewable in <a href="https://github.com/serde-rs/serde/compare/v1.0.185...v1.0.188">compare view</a></li>
</ul>
</details>
<br />


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