Build(deps-dev): Update tox requirement from >=4.55.1 to >=4.56.0 (#339)

Updates the requirements on [tox](https://github.com/tox-dev/tox) to
permit the latest version.
<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>v4.56.0</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>Fix type errors flagged by ty 0.0.43 by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3952">tox-dev/tox#3952</a></li>
<li>Drop obsolete ty: ignore directives by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3957">tox-dev/tox#3957</a></li>
<li>docs: Use double backquotes for git command in
<code>development.rst</code> by <a
href="https://github.com/mushitoriami"><code>@​mushitoriami</code></a>
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3961">tox-dev/tox#3961</a></li>
<li>docs: Fix indent misalignment in <code>reference/config.rst</code>
by <a
href="https://github.com/mushitoriami"><code>@​mushitoriami</code></a>
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3962">tox-dev/tox#3962</a></li>
<li>docs: replace <a
href="http://tox.readthedocs.org">http://tox.readthedocs.org</a> with <a
href="https://tox.wiki">https://tox.wiki</a> by <a
href="https://github.com/TejasAmle"><code>@​TejasAmle</code></a> in <a
href="https://redirect.github.com/tox-dev/tox/pull/3963">tox-dev/tox#3963</a></li>
<li>🐛 fix(config): restore skip_missing_interpreters default to False by
<a href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a>
in <a
href="https://redirect.github.com/tox-dev/tox/pull/3966">tox-dev/tox#3966</a></li>
<li>✨ feat(virtualenv): auto-pin virtualenv for end-of-life Python by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3967">tox-dev/tox#3967</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/TejasAmle"><code>@​TejasAmle</code></a>
made their first contribution in <a
href="https://redirect.github.com/tox-dev/tox/pull/3963">tox-dev/tox#3963</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/tox-dev/tox/compare/4.55.1...4.56.0">https://github.com/tox-dev/tox/compare/4.55.1...4.56.0</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>
<h1>Features - 4.56.0</h1>
<ul>
<li>Derive :ref:<code>virtualenv_spec</code> automatically: when an
environment targets a Python version the installed
:pypi:<code>virtualenv</code> can no longer create (e.g.
<code>py38</code> with virtualenv <code>21.5+</code>), tox now pins the
newest virtualenv
that still supports it and bootstraps it for that environment only. The
downgrade happens only when every
<code>base_python</code> candidate is unsupported, so environments
targeting current interpreters are unaffected. This fixes
<code>py38</code> (and other end-of-life interpreters) being silently
skipped after a virtualenv upgrade - by
:user:<code>gaborbernat</code>. (:issue:<code>3965</code>)
(:issue:<code>3965</code>)</li>
</ul>
<h1>Bug fixes - 4.56.0</h1>
<ul>
<li>The default value of <code>skip_missing_interpreters</code> changed
from <code>True</code> to <code>False</code> — missing interpreters now
fail
the run by default, matching tox 3 behavior. The tox 4 rewrite
unintentionally changed this default. To restore the
previous (incorrect) behavior, set <code>skip_missing_interpreters =
true</code> in your tox configuration or pass
<code>--skip-missing-interpreters</code> on the command line.
(:issue:<code>3965</code>)</li>
</ul>
<h1>Improved documentation - 4.56.0</h1>
<ul>
<li>Fix nested list items being rendered with continued numbering
instead of as sub-items in <code>development.rst</code>,
<code>onboarding.rst</code> and <code>explanation.rst</code>.
(:issue:<code>3960</code>)</li>
<li>Replace stale <code>http://tox.readthedocs.org</code> URL with
<code>https://tox.wiki</code> in <code>pyproject.toml</code>
(<code>Homepage</code>),
<code>.github/CONTRIBUTING.md</code>, and
<code>.github/PULL_REQUEST_TEMPLATE.md</code>.
(:issue:<code>3963</code>)</li>
</ul>
<hr />
<p>v4.55.1 (2026-06-03)</p>
<hr />
<h1>Bug fixes - 4.55.1</h1>
<ul>
<li><code>TOX_OVERRIDE</code> (and
<code>-x</code>/<code>--override</code>) now propagates through
configuration references. Previously, overriding a
base value that was later referenced via <code>{[section]key}</code>
(ini) or <code>{replace = &quot;ref&quot;, of = [...]}</code> (toml) was
ignored because reference resolution read the raw file value, bypassing
the override system - by
:user:<code>tales-aparecida</code>. (:issue:<code>3950</code>)
(:issue:<code>3950</code>)</li>
</ul>
<hr />
<p>v4.55.0 (2026-05-28)</p>
<hr />
<h1>Features - 4.55.0</h1>
<ul>
<li>Automatically pass the TERMINFO environment variable to tox
subprocesses if the output is a TTY. This variable is used
by Ghostty to communicate terminal capabilities to programs.
(:issue:<code>3946</code>)</li>
</ul>
<h1>Bug fixes - 4.55.0</h1>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tox-dev/tox/commit/f3a626a016c96206a5306ccd73f08eb0e83e4abc"><code>f3a626a</code></a>
release 4.56.0</li>
<li><a
href="https://github.com/tox-dev/tox/commit/140733c12949e4f00b4fe9d3acccee31a2c8367c"><code>140733c</code></a>
✨ feat(virtualenv): auto-pin virtualenv for end-of-life Python (<a
href="https://redirect.github.com/tox-dev/tox/issues/3967">#3967</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/bfbc87656a8a0b97fffbab4796660077999971da"><code>bfbc876</code></a>
🐛 fix(config): restore skip_missing_interpreters default to False (<a
href="https://redirect.github.com/tox-dev/tox/issues/3966">#3966</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/8ba8075acd45f336347b0133eae7d69af4aab0cd"><code>8ba8075</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3964">#3964</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/e9d06b0aa8db43e7c3b3b3730be272febe405ec7"><code>e9d06b0</code></a>
docs: replace <a
href="http://tox.readthedocs.org">http://tox.readthedocs.org</a> with <a
href="https://tox.wiki">https://tox.wiki</a> (<a
href="https://redirect.github.com/tox-dev/tox/issues/3963">#3963</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/94f5a6b65285b9082b3bef0f47c5d41560da4dbc"><code>94f5a6b</code></a>
docs: Fix indent misalignment in <code>reference/config.rst</code> (<a
href="https://redirect.github.com/tox-dev/tox/issues/3962">#3962</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/d43df676b0551dedf31c7a8a3643ca66fc436c34"><code>d43df67</code></a>
docs: Use double backquotes for git command in
<code>development.rst</code> (<a
href="https://redirect.github.com/tox-dev/tox/issues/3961">#3961</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/503be811f2bc52e94d971c1173f461d4b9266b1d"><code>503be81</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3958">#3958</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/2ec88817bf424febd4ea173a21b6091ec9e21ca3"><code>2ec8881</code></a>
Drop obsolete ty: ignore directives (<a
href="https://redirect.github.com/tox-dev/tox/issues/3957">#3957</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/06f87acbc4b44fb1d8a093948aa3a4b5ff468678"><code>06f87ac</code></a>
build(deps): bump actions/checkout from 6.0.2 to 6.0.3 (<a
href="https://redirect.github.com/tox-dev/tox/issues/3954">#3954</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/tox-dev/tox/compare/4.55.1...4.56.0">compare
view</a></li>
</ul>
</details>
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Author: Diapolo10

pyproject.toml

@@ -50,7 +50,7 @@ dev = [
     "pytest-xdist[psutil]>=3.8.0",
     "ruff>=0.15.18",
     "sphinx>=9.0.4",
-    "tox>=4.55.1",
+    "tox>=4.56.0",
     "tox-gh-actions>=3.5.0",
 ]