[chore(cargo)](deps): Bump serde from 1.0.171 to 1.0.175 (#204)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.171 to
1.0.175.
<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>v1.0.175</h2>
<ul>
<li>Restore missing LICENSE files in serde_derive crate (<a
href="https://github.com/serde-rs/serde/issues/2527">#2527</a>,
thanks <a
href="https://github.com/ankane"><code>@​ankane</code></a>)</li>
</ul>
<h2>v1.0.174</h2>
<ul>
<li>Documentation improvements</li>
</ul>
<h2>v1.0.173</h2>
<ul>
<li>Fix missing trait implementations when using serde derive macro on a
macro-generated data structure, such as via the <code>bitflags</code>
crate (<a
href="https://github.com/serde-rs/serde/issues/2516">#2516</a>)</li>
</ul>
<h2>v1.0.172</h2>
<ul>
<li>Experiment with precompiling the serde_derive macros to reduce build
time (<a
href="https://github.com/serde-rs/serde/issues/2514">#2514</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/serde-rs/serde/commit/6140b6f527f93e718ecf05e51bdc33829d3e95f5"><code>6140b6f</code></a>
Release 1.0.175</li>
<li><a
href="https://github.com/serde-rs/serde/commit/4cabc9f293e84c7f87eba443949b29495a1e9986"><code>4cabc9f</code></a>
Merge pull request <a
href="https://github.com/serde-rs/serde/issues/2527">#2527</a>
from ankane/license-files</li>
<li><a
href="https://github.com/serde-rs/serde/commit/aa7c6345a4a724d24ced838722d34af3f650cb55"><code>aa7c634</code></a>
Include license files in serde_derive crate</li>
<li><a
href="https://github.com/serde-rs/serde/commit/27414c90a8b6ad44f40263e672fba64a8badb53b"><code>27414c9</code></a>
Merge pull request <a
href="https://github.com/serde-rs/serde/issues/2522">#2522</a>
from serde-rs/leak</li>
<li><a
href="https://github.com/serde-rs/serde/commit/50e2f4b21370e40b6c3735952a6983954c84172d"><code>50e2f4b</code></a>
Leak all memory allocated during macro expansion</li>
<li><a
href="https://github.com/serde-rs/serde/commit/22be673beb63adf7fa436296719528f150946201"><code>22be673</code></a>
Release 1.0.174</li>
<li><a
href="https://github.com/serde-rs/serde/commit/166c89fabfa2c04d39c2abaf8b0a690d431ea94c"><code>166c89f</code></a>
Opt in to generate-link-to-definition when building on docs.rs</li>
<li><a
href="https://github.com/serde-rs/serde/commit/6e0b13eedbe24c54d49b421ae1ef36e007e8e592"><code>6e0b13e</code></a>
Release 1.0.173</li>
<li><a
href="https://github.com/serde-rs/serde/commit/7e8f978ca9127cf2c0dec9aca68972f6187eff85"><code>7e8f978</code></a>
Handle $crate special case</li>
<li><a
href="https://github.com/serde-rs/serde/commit/6c0e838a7ce326ae0d3d0c8b34a3695c40592fc0"><code>6c0e838</code></a>
Always consider empty output to be unsuccessful</li>
<li>Additional commits viewable in <a
href="https://github.com/serde-rs/serde/compare/v1.0.171...v1.0.175">compare
view</a></li>
</ul>
</details>
<br />


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