1024: Bump tox from 4.18.0 to 4.21.0 r=sanders41 a=dependabot[bot] Bumps [tox](https://github.com/tox-dev/tox) from 4.18.0 to 4.21.0. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/tox-dev/tox/releases">tox's releases</a>.</em></p> <blockquote> <h2>4.18.1</h2>  <h2>What's Changed</h2> <ul> <li>Fixup the spec string for sys.executable by <a href="https://github.com/hroncok"><code>`@hroncok</code></a>` in <a href="https://redirect.github.com/tox-dev/tox/pull/3327">tox-dev/tox#3327</a></li> <li>Fix issue link in changelog by <a href="https://github.com/schlamar"><code>`@schlamar</code></a>` in <a href="https://redirect.github.com/tox-dev/tox/pull/3332">tox-dev/tox#3332</a></li> <li>Properly document the <code>tox_env_teardown</code> hook by <a href="https://github.com/kemzeb"><code>`@kemzeb</code></a>` in <a href="https://redirect.github.com/tox-dev/tox/pull/3333">tox-dev/tox#3333</a></li> <li>Add 3.13 to CI and bump deps by <a href="https://github.com/gaborbernat"><code>`@gaborbernat</code></a>` in <a href="https://redirect.github.com/tox-dev/tox/pull/3339">tox-dev/tox#3339</a></li> </ul> <h2>New Contributors</h2> <ul> <li><a href="https://github.com/schlamar"><code>`@schlamar</code></a>` made their first contribution in <a href="https://redirect.github.com/tox-dev/tox/pull/3332">tox-dev/tox#3332</a></li> <li><a href="https://github.com/kemzeb"><code>`@kemzeb</code></a>` made their first contribution in <a href="https://redirect.github.com/tox-dev/tox/pull/3333">tox-dev/tox#3333</a></li> </ul> <p><strong>Full Changelog</strong>: <a href="https://github.com/tox-dev/tox/compare/4.18.0...4.18.1">https://github.com/tox-dev/tox/compare/4.18.0...4.18.1</a></p> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/tox-dev/tox/blob/main/docs/changelog.rst">tox's changelog</a>.</em></p> <blockquote> <h2>v4.21.0 (2024-09-30)</h2> <p>Features - 4.21.0</p> <pre><code>- Native TOML configuration support - by :user:`gaborbernat`. (:issue:`999`) <p>Improved Documentation - 4.21.0 </code></pre></p> <ul> <li>Update Loader docs - by :user:ziima (:issue:<code>3352</code>)</li> </ul> <h2>v4.20.0 (2024-09-18)</h2> <p>Features - 4.20.0</p> <pre><code>- Separate the list dependencies functionality to a separate abstract class allowing code reuse in plugins (such as ``tox-uv``) - by :gaborbernat`. (:issue:`3347`) <h2>v4.19.0 (2024-09-17)</h2> <p>Features - 4.19.0 </code></pre></p> <ul> <li>Support <code>pypy-<major>.<minor></code> environment names for PyPy environments - by :user:<code>gaborbernat</code>. (:issue:<code>3346</code>)</li> </ul> <h2>v4.18.1 (2024-09-07)</h2> <p>Bugfixes - 4.18.1</p> <pre><code>- Fix and test the string spec for the ``sys.executable`` interpreter (introduced in :pull:`3325`) - by :user:`hroncok` (:issue:`3327`) <p>Improved Documentation - 4.18.1 </code></pre></p> <ul> <li>Changes the <code>tox_env_teardown</code> docstring to explain the hook is called after a tox env was teared down. (:issue:<code>3305</code>)</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/tox-dev/tox/commit/46bef9eff54c53eeced031436d2d1a068b4bfb16"><code>46bef9e</code></a> release 4.21.0</li> <li><a href="https://github.com/tox-dev/tox/commit/cea105b7007039c830c92ae92aa5792e819ee487"><code>cea105b</code></a> True TOML config support (<a href="https://redirect.github.com/tox-dev/tox/issues/3353">#3353</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/a04b039fe0486752ec79733b993d73ecdf282795"><code>a04b039</code></a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/tox-dev/tox/issues/3385">#3385</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/f5eba31ed3aeedcb41db64fca5b624a75abff32d"><code>f5eba31</code></a> Update Loader docs (<a href="https://redirect.github.com/tox-dev/tox/issues/3352">#3352</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/329db639b5573cf9b5990fe990a3e48789d1fc9a"><code>329db63</code></a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/tox-dev/tox/issues/3350">#3350</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/f4b3bd20f268e6da78c2a89b531f364cec35b90b"><code>f4b3bd2</code></a> Bump pypa/gh-action-pypi-publish from 1.10.1 to 1.10.2 (<a href="https://redirect.github.com/tox-dev/tox/issues/3349">#3349</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/a04cc3afa08e4641ba8419eb320e738d4ef8180c"><code>a04cc3a</code></a> release 4.20.0</li> <li><a href="https://github.com/tox-dev/tox/commit/4d8f5fd826276b59a73a4851dcc2fbb388a0d574"><code>4d8f5fd</code></a> Separate list dependencies to a separate installer class (<a href="https://redirect.github.com/tox-dev/tox/issues/3347">#3347</a>)</li> <li><a href="https://github.com/tox-dev/tox/commit/0cb816c572a1b549c9e1b20d3bee4ed3fbde6b43"><code>0cb816c</code></a> YML to YAML</li> <li><a href="https://github.com/tox-dev/tox/commit/2f8362416fdcc94ed99b99d81387ac5ea20311f1"><code>2f83624</code></a> release 4.19.0</li> <li>Additional commits viewable in <a href="https://github.com/tox-dev/tox/compare/4.18.0...4.21.0">compare view</a></li> </ul> </details> <br /> [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=tox&package-manager=pip&previous-version=4.18.0&new-version=4.21.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) You can trigger a rebase of this PR by commenting ``@dependabot` rebase`. 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