Update libtest-mimic requirement from 0.7 to 0.8

Updates the requirements on [libtest-mimic](https://github.com/LukasKalbertodt/libtest-mimic) to permit the latest version. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/LukasKalbertodt/libtest-mimic/releases">libtest-mimic's releases</a>.</em></p> <blockquote> <h2>v0.8.1</h2> <ul> <li>Fix bug when executing trials on fewer threads than trials (thanks <a href="https://github.com/hanna-kruppe"><code>@​hanna-kruppe</code></a> for catching this)</li> </ul> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/LukasKalbertodt/libtest-mimic/blob/master/CHANGELOG.md">libtest-mimic's changelog</a>.</em></p> <blockquote> <h2>[0.8.1] - 2024-10-05</h2> <ul> <li>Fix bug when executing trial on fewer threads than trials (thanks <a href="https://github.com/hanna-kruppe"><code>@​hanna-kruppe</code></a> for catching this)</li> </ul> <h2>[0.8.0] - 2024-10-05</h2> <ul> <li><strong>Breaking</strong>: bump MSRV to 1.65</li> <li>Remove <code>threadpool</code> dependency, getting rid of memory leaks observed when running under valgrind (thanks <a href="https://github.com/Felix-El"><code>@​Felix-El</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/46">#46</a></li> <li>Switch from <code>termcolor</code> to <code>anstream</code> to get rid of duplicate dependencies (thanks <a href="https://github.com/hanna-kruppe"><code>@​hanna-kruppe</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/44">#44</a></li> <li>Bump dev-dependency <code>fastrand</code> to <code>2</code> (thanks <a href="https://github.com/alexanderkjall"><code>@​alexanderkjall</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/47">#47</a></li> <li>Fix outdated docs</li> </ul> <h2>[0.7.3] - 2024-05-10</h2> <ul> <li>Default to single-threaded tests for WebAssembly (thanks <a href="https://github.com/alexcrichton"><code>@​alexcrichton</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/41">#41</a></li> </ul> <h2>[0.7.2] - 2024-04-09</h2> <ul> <li>Fix <code>Conclusion::exit_code</code> (logic was inverted in 0.7.1)</li> </ul> <h2>[0.7.1] - 2024-04-09</h2> <ul> <li>Add <code>Conclusion::exit_code</code> and note about destructors/cleanup to docs of <code>exit</code> and <code>exit_if_failed</code> <a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/e938e537e02d8cb9c9791fa63bcb8f4746dc3511"><code>e938e537e</code></a></li> </ul> <h2>[0.7.0] - 2024-01-14</h2> <ul> <li>Also check <code>kind</code> when filtering tests (thanks <a href="https://github.com/sunshowers"><code>@​sunshowers</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/30">#30</a> <ul> <li>This is potentially breaking as additional or fewer tests might be executed in some situations.</li> </ul> </li> <li>Add JSON format output (thanks <a href="https://github.com/PaulWagener"><code>@​PaulWagener</code></a> and <a href="https://github.com/t-moe"><code>@​t-moe</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/35">#35</a></li> <li>Add no-op flags to add CLI compatibility for IntellJ Rust (thanks <a href="https://github.com/Dinnerbone"><code>@​Dinnerbone</code></a> and <a href="https://github.com/t-moe"><code>@​t-moe</code></a>) <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/28">#28</a> / <a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/70cdc55ee50df8325d11f5e2cbe53c6bf74d375d"><code>70cdc55</code></a></li> </ul> <h2>[0.6.1] - 2022-11-05</h2> <h3>Fixed</h3> <ul> <li>Actually spawn as many threads as specified by <code>--test-threads</code> (thanks <a href="https://github.com/hgzimmerman"><code>@​hgzimmerman</code></a>) in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/32">#32</a>.</li> <li>Fix &amp; improve docs</li> <li>Fix badge in README</li> </ul> <h3>Changed</h3> <ul> <li>Deemphasize MSRV by removing check and note from README in <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/24">#24</a>.</li> </ul> <h2>[0.6.0] - 2022-11-05</h2> <h3>Changed</h3> <ul> <li><strong>Breaking</strong>: Updated <code>clap</code> to version 4 (thanks <a href="https://github.com/msrd0"><code>@​msrd0</code></a>)</li> <li><strong>Breaking</strong>: Bump MSRV to 1.60 (due to the clap update)</li> </ul> <h3>Removed</h3> <ul> <li><strong>Breaking</strong>: Remove <code>FromStr</code> impls for <code>args::{ColorSetting, FormatSetting}</code> (use <code>clap::ValueEnum</code> instead).</li> </ul> <h2>[0.5.2] - 2022-08-14</h2> <h3>Added</h3> <ul> <li>Re-add <code>--nocapture</code> as a noop argument <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/pull/18">#18</a> (thanks <a href="https://github.com/sunshowers"><code>@​sunshowers</code></a>)</li> </ul> <h3>Fixed</h3> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/63e4ec13f15c4adc5b36e3cc0c5f49e19b50f480"><code>63e4ec1</code></a> Bump version to 0.8.1</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/e17efb916a68573063449d40ea368a463703e991"><code>e17efb9</code></a> Remove outdated comment</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/41a18561074fab4602505b5b646fd352ea04ac66"><code>41a1856</code></a> Add additional tests to ensure threading behavior is correct</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/d6ac84fe44f15bddf801a0a59599995b9363068c"><code>d6ac84f</code></a> Fix bug in parallel test execution</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/7413feb56174b0e8ec000bbb684767b7ed74bf54"><code>7413feb</code></a> Bump version to 0.8.0</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/0720b25137ae97550b67198dc88170a382401a9e"><code>0720b25</code></a> Fix outdated docs</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/d194ff99f600e9adecd1ffb262e764b9ab8e03d2"><code>d194ff9</code></a> Merge branch 'Felix-El/master'</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/09884d81f4038dfef999f64888663efa72f7072a"><code>09884d8</code></a> Avoid memory leaks</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/2ebaec84b5b7ae4f17285b8eedc1ad3b86d4d0c7"><code>2ebaec8</code></a> Merge pull request <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/issues/47">#47</a> from alexanderkjall/bump-fastrand</li> <li><a href="https://github.com/LukasKalbertodt/libtest-mimic/commit/57d60db2491cb800ca4a46b8275efda0b29e9d50"><code>57d60db</code></a> Merge pull request <a href="https://redirect.github.com/LukasKalbertodt/libtest-mimic/issues/44">#44</a> from hanna-kruppe/anstream</li> <li>Additional commits viewable in <a href="https://github.com/LukasKalbertodt/libtest-mimic/compare/v0.7.0...v0.8.1">compare view</a></li> </ul> </details> <br /> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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