Build(deps-dev): Update tox requirement from >=4.56.1 to >=4.56.2 (#349)

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>v4.56.2</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>🔧 chore(type): drop stale ty invalid-assignment ignores by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3970">tox-dev/tox#3970</a></li>
<li>Fix 17 bugs found in a deep codebase sweep by <a
href="https://github.com/gaborbernat"><code>@​gaborbernat</code></a> in
<a
href="https://redirect.github.com/tox-dev/tox/pull/3974">tox-dev/tox#3974</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/tox-dev/tox/compare/4.56.1...4.56.2">https://github.com/tox-dev/tox/compare/4.56.1...4.56.2</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>Bug fixes - 4.56.2</h1>
<ul>
<li>
<p>Fix a batch of latent defects found in a codebase audit:</p>
<ul>
<li>stop duplicating <code>--extra-index-url</code> when a merged
requirements line repeats an already-seen index;</li>
<li>render <code>--no-binary</code>/<code>--only-binary</code> as
comma-joined strings instead of leaking the internal <code>set</code>
into the
pip command line;</li>
<li>report a clear error instead of <code>IndexError</code> for a bare
one-argument flag (<code>-c</code>, <code>-r</code>, <code>-f</code>,
<code>-e</code>) in
<code>deps</code> or constraints;</li>
<li>canonicalize <code>optional-dependencies</code> keys and
self-referential (recursive) extra names so non-canonical spellings
no longer silently drop dependencies;</li>
<li>raise a clear error instead of <code>KeyError</code> when
<code>dependency_groups</code> is requested without a
<code>[dependency-groups]</code> table;</li>
<li>stop a native TOML <code>{ replace = &quot;env&quot; }</code>
reference from leaking its resolution chain into sibling list entries
and
tripping a spurious <code>circular chain</code> error;</li>
<li>expand the range that actually matched in a factor expression rather
than the first identical digit-range substring;</li>
<li>strip the backslash from an escaped <code>\;</code> in
<code>set_env</code> values;</li>
<li>skip option values during command auto-detection so an environment
named like a subcommand (e.g. <code>tox -e list</code>) is
no longer misread;</li>
<li>treat an empty list-typed environment variable (e.g.
<code>TOX_DISCOVER=</code>) as an empty list rather than
<code>[&quot;&quot;]</code>;</li>
<li>report an environment whose name is an empty string as present in
<code>Config</code> membership tests;</li>
<li>fail evaluation gracefully instead of crashing the driver thread
when <code>tox p -p all</code> is run with an empty
selection;</li>
<li>avoid rebuilding a throwaway PEP 517 frontend against the previous
root when a package environment's <code>root</code> is
reassigned before a frontend exists;</li>
<li>avoid crashing <code>create_session_view</code> when the package and
its session copy share no common path (e.g. different
Windows drives);</li>
<li>close the pseudo-terminal file descriptors that leaked on every
command run under a tty and on the
terminal-attribute inheritance error path;</li>
<li>honor the stop signal in the Windows overlapped-I/O reader while a
read is still pending, so shutdown no longer
risks hanging on a child that holds its pipe open without producing
output. (:issue:<code>3974</code>)</li>
</ul>
</li>
</ul>
<hr />
<p>v4.56.1 (2026-06-25)</p>
<hr />
<h1>Bug fixes - 4.56.1</h1>
<ul>
<li>Fix <code>{ replace = &quot;if&quot; ... extend = true }</code>
corrupting the resulting list when <code>then</code> or
<code>else</code> is a scalar
string (e.g. <code>then = &quot;-v&quot;</code>): a non-empty scalar
string is now appended as a single element instead of being iterated
character-by-character, while a false <code>if</code> with no
<code>else</code> (yielding <code>&quot;&quot;</code>) contributes
nothing rather than an
empty element, and list/set results are still spread into the parent.
(:issue:<code>3969</code>)</li>
</ul>
<hr />
<p>v4.56.0 (2026-06-23)</p>
<hr />
<p>Features - 4.56.0</p>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tox-dev/tox/commit/5458a28f15a36c0d7ad2e7166cce4dac0a9cd7cf"><code>5458a28</code></a>
release 4.56.2</li>
<li><a
href="https://github.com/tox-dev/tox/commit/d3dc2d1fb0269820dfcb4674d5753b2345e7dc50"><code>d3dc2d1</code></a>
Fix 17 bugs found in a deep codebase sweep (<a
href="https://redirect.github.com/tox-dev/tox/issues/3974">#3974</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/b55fe2fbda7b44f3b9dcc7291b37ae2bb4f6ab34"><code>b55fe2f</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3973">#3973</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/7ba0f812df9ea48bebb0295805dfe4dfbfd21214"><code>7ba0f81</code></a>
:moneybag: Surface GitHub Sponsors + thanks.dev</li>
<li><a
href="https://github.com/tox-dev/tox/commit/03c2d583a735aac29862313fb978a3eaa2b6804e"><code>03c2d58</code></a>
build(deps): bump actions/cache from 5.0.5 to 6.1.0 (<a
href="https://redirect.github.com/tox-dev/tox/issues/3972">#3972</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/34962f1a5fbba0596485b6810bab72abb94e8d27"><code>34962f1</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/tox-dev/tox/issues/3971">#3971</a>)</li>
<li><a
href="https://github.com/tox-dev/tox/commit/0df25f4a5607440c902e7741509b164c0689a673"><code>0df25f4</code></a>
🔧 chore(type): drop stale ty invalid-assignment ignores (<a
href="https://redirect.github.com/tox-dev/tox/issues/3970">#3970</a>)</li>
<li>See full diff in <a
href="https://github.com/tox-dev/tox/compare/4.56.1...4.56.2">compare
view</a></li>
</ul>
</details>
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</details>

Author: Diapolo10

pyproject.toml

@@ -50,7 +50,7 @@ dev = [
     "pytest-xdist[psutil]>=3.8.0",
     "ruff>=0.15.20",
     "sphinx>=9.0.4",
-    "tox>=4.56.1",
+    "tox>=4.56.2",
     "tox-gh-actions>=3.5.0",
 ]