[chore(cargo)](deps): Bump serde from 1.0.168 to 1.0.171 (#194)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.168 to
1.0.171.
<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>v1.0.171</h2>
<ul>
<li>Support <code>derive(Deserialize)</code> on unit structs that have
const generics (<a
href="https://redirect.github.com/serde-rs/serde/issues/2500">#2500</a>,
thanks <a
href="https://github.com/Baptistemontan"><code>@​Baptistemontan</code></a>)</li>
</ul>
<h2>v1.0.170</h2>
<ul>
<li>Produce error message on suffixed string literals inside serde
attributes (<a
href="https://redirect.github.com/serde-rs/serde/issues/2242">#2242</a>)</li>
<li>Support single identifier as unbraced default value for const
generic parameter (<a
href="https://redirect.github.com/serde-rs/serde/issues/2449">#2449</a>)</li>
</ul>
<h2>v1.0.169</h2>
<ul>
<li>Add Deserializer::deserialize_identifier support for adjacently
tagged enums (<a
href="https://redirect.github.com/serde-rs/serde/issues/2475">#2475</a>,
thanks <a
href="https://github.com/Baptistemontan"><code>@​Baptistemontan</code></a>)</li>
<li>Fix unused_braces lint in generated Deserialize impl that uses
braced const generic expressions (<a
href="https://redirect.github.com/serde-rs/serde/issues/2414">#2414</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/serde-rs/serde/commit/03da66c805499a9e79a5b6cb11fa21ef6da636eb"><code>03da66c</code></a>
Release 1.0.171</li>
<li><a
href="https://github.com/serde-rs/serde/commit/f75426f47e788e92cc58d94bb76074314810b590"><code>f75426f</code></a>
Inline visitor_expr of unit struct deserialize impl</li>
<li><a
href="https://github.com/serde-rs/serde/commit/662fc3861cfe3ac1b8ec0a08845192a8221e861a"><code>662fc38</code></a>
Add test of const-generic unit struct where-clause edge case</li>
<li><a
href="https://github.com/serde-rs/serde/commit/28c10020b98123d7b3b4253d1273937c691ad888"><code>28c1002</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2500">#2500</a>
from Baptistemontan/derive_generic_unit_struct</li>
<li><a
href="https://github.com/serde-rs/serde/commit/89c8d85de97414b129da568eba51e92f233c42d6"><code>89c8d85</code></a>
allow Deserialize derive to handle generic unit structs</li>
<li><a
href="https://github.com/serde-rs/serde/commit/6502838f2704a9f356fb37c3c63206b0d319430c"><code>6502838</code></a>
Release 1.0.170</li>
<li><a
href="https://github.com/serde-rs/serde/commit/c93a0f335a68e9cee2296f6a6190457029a281b7"><code>c93a0f3</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2499">#2499</a>
from dtolnay/strsuffix</li>
<li><a
href="https://github.com/serde-rs/serde/commit/8264e002a7598d25b11c7e11df1b1acfa0938620"><code>8264e00</code></a>
Reject suffixed string literals inside serde attrs</li>
<li><a
href="https://github.com/serde-rs/serde/commit/117ef22142db12eea644b91610592cd5edc20b78"><code>117ef22</code></a>
Add ui test with suffixed string literals in attribute</li>
<li><a
href="https://github.com/serde-rs/serde/commit/3fb5e71c33279500f7e29e2512efafa64fe07e96"><code>3fb5e71</code></a>
Release 1.0.169</li>
<li>Additional commits viewable in <a
href="https://github.com/serde-rs/serde/compare/v1.0.168...v1.0.171">compare
view</a></li>
</ul>
</details>
<br />


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