chore(deps): update rstest requirement from 0.19.0 to 0.21.0 (#1163)

Updates the requirements on [rstest](https://github.com/la10736/rstest)
to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/la10736/rstest/releases">rstest's
releases</a>.</em></p>
<blockquote>
<h2>0.21.0</h2>
<p>Use <code>crate-name</code> feature to enable the crate rename
support (enabled by default)</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/la10736/rstest/blob/master/CHANGELOG.md">rstest's
changelog</a>.</em></p>
<blockquote>
<h2>[0.21.0] 2024/6/1</h2>
<h3>Changed</h3>
<ul>
<li>Add feature <code>crate-name</code> enabled by default to opt-in
crate rename
support. See <a
href="https://redirect.github.com/la10736/rstest/issues/258">#258</a></li>
</ul>
<h2>[0.20.0] 2024/5/30</h2>
<h3>Add</h3>
<ul>
<li>Implemented <code>#[by_ref]</code> attribute to take get a local
lifetime for test arguments.
See <a
href="https://redirect.github.com/la10736/rstest/issues/241">#241</a>
for more details. Thanks to
<a href="https://github.com/narpfel"><code>@​narpfel</code></a> for
suggesting it and useful discussions.</li>
<li>Support for import <code>rstest</code> with another name. See <a
href="https://redirect.github.com/la10736/rstest/issues/221">#221</a></li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Don't remove Lifetimes from test function if any. See <a
href="https://redirect.github.com/la10736/rstest/issues/230">#230</a>
<a href="https://redirect.github.com/la10736/rstest/issues/241">#241</a>
for more details.</li>
<li><a
href="https://doc.rust-lang.org/std/path/struct.PathBuf.html"><code>PathBuf</code></a>
does no longer need to be
in scope when using <code>#[files]</code> (see <a
href="https://redirect.github.com/la10736/rstest/pull/242">#242</a>)</li>
<li><code>#[from(now:🉑:also::path::for::fixture)]</code> See <a
href="https://redirect.github.com/la10736/rstest/issues/246">#246</a>
for more details</li>
</ul>
<h2>[0.19.0] 2024/4/9</h2>
<h3>Changed</h3>
<ul>
<li>Defined <code>rust-version</code> for each crate (see <a
href="https://redirect.github.com/la10736/rstest/issues/227">#227</a>)</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>
<p><code>#[once]</code> fixtures now require the returned type to be
<a
href="https://doc.rust-lang.org/std/marker/trait.Sync.html"><code>Sync</code></a>
to prevent UB
when tests are executed in parallel. (see <a
href="https://redirect.github.com/la10736/rstest/issues/235">#235</a>
for more details)</p>
</li>
<li>
<p><code>#[future(awt)]</code> and <code>#[awt]</code> now properly
handle mutable (<code>mut</code>) parameters by treating futures as
immutable and
treating the awaited rebinding as mutable.</p>
</li>
</ul>
<h2>[0.18.2] 2023/8/13</h2>
<h3>Changed</h3>
<ul>
<li>Now <code>#[files]</code> accept also parent folders (see <a
href="https://redirect.github.com/la10736/rstest/issues/205">#205</a>
for more details).</li>
</ul>
<h2>[0.18.1] 2023/7/5</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="38da6bfb96"><code>38da6bf</code></a>
Prepare 0.21.0 Release</li>
<li><a
href="ca69788392"><code>ca69788</code></a>
bump version rstest_test to 0.13.0</li>
<li><a
href="b6b43c6740"><code>b6b43c6</code></a>
Clean chackoutlist</li>
<li><a
href="fef4f7b4f4"><code>fef4f7b</code></a>
Implemented Opt-in crate-name support Fix <a
href="https://redirect.github.com/la10736/rstest/issues/258">#258</a></li>
<li><a
href="236be92a8a"><code>236be92</code></a>
Build should use build tests target</li>
<li><a
href="8fde5be94f"><code>8fde5be</code></a>
Prepare next changelog</li>
<li><a
href="f29e6346fe"><code>f29e634</code></a>
Dependency should have a n explicit version to be published</li>
<li><a
href="e27ad2a4db"><code>e27ad2a</code></a>
Removed empty section</li>
<li><a
href="3867794483"><code>3867794</code></a>
Fixed docs</li>
<li><a
href="b90fb8e092"><code>b90fb8e</code></a>
Fix checkout list</li>
<li>Additional commits viewable in <a
href="https://github.com/la10736/rstest/compare/v0.19.0...v0.21.0">compare
view</a></li>
</ul>
</details>
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Cargo.toml

@@ -58,7 +58,7 @@ palette = "0.7.3"
 pretty_assertions = "1.4.0"
 rand = "0.8.5"
 rand_chacha = "0.3.1"
-rstest = "0.19.0"
+rstest = "0.21.0"
 serde_json = "1.0.109"
 
 [lints.rust]