Bump mypy from 1.11.1 to 1.12.1 (#200)

Bumps [mypy](https://github.com/python/mypy) from 1.11.1 to 1.12.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/python/mypy/blob/master/CHANGELOG.md">mypy's
changelog</a>.</em></p>
<blockquote>
<h3>Mypy 1.12.1</h3>
<ul>
<li>Fix crash when showing partially analyzed type in error message
(Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/17961">17961</a>)</li>
<li>Fix iteration over union (when self type is involved) (Shantanu, PR
<a
href="https://redirect.github.com/python/mypy/pull/17976">17976</a>)</li>
<li>Fix type object with type var default in union context (Jukka
Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/17991">17991</a>)</li>
<li>Revert change to <code>os.path</code> stubs affecting use of
<code>os.PathLike[Any]</code> (Shantanu, PR <a
href="https://redirect.github.com/python/mypy/pull/17995">17995</a>)</li>
</ul>
<h3>Acknowledgements</h3>
<p>Thanks to all mypy contributors who contributed to this release:</p>
<ul>
<li>Ali Hamdan</li>
<li>Anders Kaseorg</li>
<li>Bénédikt Tran</li>
<li>Brian Schubert</li>
<li>bzoracler</li>
<li>Chelsea Durazo</li>
<li>Danny Yang</li>
<li>Edgar Ramírez Mondragón</li>
<li>Eric Mark Martin</li>
<li>InSync</li>
<li>Ivan Levkivskyi</li>
<li>Jordandev678</li>
<li>Katrina Connors</li>
<li>Kirill Podoprigora</li>
<li>Marc Mueller</li>
<li>Max Muoto</li>
<li>Max Murin</li>
<li>Michael Carlstrom</li>
<li>Michael I Chen</li>
<li>Pradyun Gedam</li>
<li>quinn-sasha</li>
<li>Raphael Krupinski</li>
<li>Sebastian Rittau</li>
<li>Shantanu</li>
<li>sobolevn</li>
<li>Soubhik Kumar Mitra</li>
<li>Stanislav Terliakov</li>
<li>wyattscarpenter</li>
</ul>
<p>I’d also like to thank my employer, Dropbox, for supporting mypy
development.</p>
<h2>Mypy 1.11</h2>
<p>We’ve just uploaded mypy 1.11 to the Python Package Index (<a
href="https://pypi.org/project/mypy/">PyPI</a>). Mypy is a static type
checker for Python. This release includes new features, performance
improvements and bug fixes. You can install it as follows:</p>
<pre><code>python3 -m pip install -U mypy
</code></pre>
<p>You can read the full documentation for this release on <a
href="http://mypy.readthedocs.io">Read the Docs</a>.</p>
<h3>Support Python 3.12 Syntax for Generics (PEP 695)</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/python/mypy/commit/050d12f8d5b07a892fc4e24fabc485cfafce3ff0"><code>050d12f</code></a>
Bump version to 1.12.1</li>
<li><a
href="https://github.com/python/mypy/commit/346e370fc314b3c7c84a1e3e920dd9afe039b4bd"><code>346e370</code></a>
[1.12 backport] revert os.path change (<a
href="https://redirect.github.com/python/mypy/issues/17995">#17995</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/71e1f055f0fcfa289a8ed6e82297ceb0a3e74417"><code>71e1f05</code></a>
Fix type object with type var default in union context (<a
href="https://redirect.github.com/python/mypy/issues/17991">#17991</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/34d86038bab0b79251019fd1cbb438b7aef1a592"><code>34d8603</code></a>
Fix iteration over union (when self type is involved) (<a
href="https://redirect.github.com/python/mypy/issues/17976">#17976</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/2485bed372cbc82ea4789c480eb6359905693e86"><code>2485bed</code></a>
Use kw-only args for member access booleans (<a
href="https://redirect.github.com/python/mypy/issues/17975">#17975</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/a5e9b0b7fe5f2b5e3b3efac844216159a24ebd9c"><code>a5e9b0b</code></a>
Fix crash when showing partially analyzed type in error message (<a
href="https://redirect.github.com/python/mypy/issues/17961">#17961</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/4775da1977dc116d2005e61e819df1603780178a"><code>4775da1</code></a>
Bump version to 1.12.1+dev</li>
<li><a
href="https://github.com/python/mypy/commit/f2a39b16f00e2b7b1922aa9324c092cabbae57a9"><code>f2a39b1</code></a>
Update version to 1.12.0</li>
<li><a
href="https://github.com/python/mypy/commit/b4ec37acce8e0b47518f62a87710375a5b91afed"><code>b4ec37a</code></a>
Add one more 1.12 changelog item (<a
href="https://redirect.github.com/python/mypy/issues/17936">#17936</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/cc1c679a9296e9f66b8ed54d5aea559829b4fcfb"><code>cc1c679</code></a>
Better handling of generic functions in partial plugin (<a
href="https://redirect.github.com/python/mypy/issues/17925">#17925</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/python/mypy/compare/v1.11.1...v1.12.1">compare
view</a></li>
</ul>
</details>
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