Bump mypy from 1.17.1 to 1.18.1 (#429)

Bumps [mypy](https://github.com/python/mypy) from 1.17.1 to 1.18.1.
<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>
<h1>Mypy Release Notes</h1>
<h2>Next Release</h2>
<h2>Mypy 1.18</h2>
<p>We’ve just uploaded mypy 1.18 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>Mypy Performance Improvements</h3>
<p>Mypy 1.18 includes numerous performance improvements, resulting in
about 40% speedup
compared to 1.17 when type checking mypy itself. In extreme cases, the
improvement
can be 10x or higher. The list below is an overview of the various mypy
optimizations.
Many mypyc improvements (discussed in a separate section below) also
improve performance.</p>
<p>Type caching optimizations have a small risk of causing regressions.
When
reporting issues with unexpected inferred types, please also check if
<code>--disable-expression-cache</code> will work around the issue, as
it turns off some of
these optimizations.</p>
<ul>
<li>Improve self check performance by 1.8% (Jukka Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19768">19768</a>, <a
href="https://redirect.github.com/python/mypy/pull/19769">19769</a>, <a
href="https://redirect.github.com/python/mypy/pull/19770">19770</a>)</li>
<li>Optimize fixed-format deserialization (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19765">19765</a>)</li>
<li>Use macros to optimize fixed-format deserialization (Ivan
Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19757">19757</a>)</li>
<li>Two additional micro‑optimizations (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19627">19627</a>)</li>
<li>Another set of micro‑optimizations (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19633">19633</a>)</li>
<li>Cache common types (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19621">19621</a>)</li>
<li>Skip more method bodies in third‑party libraries for speed (Ivan
Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19586">19586</a>)</li>
<li>Simplify the representation of callable types (Ivan Levkivskyi, PR
<a
href="https://redirect.github.com/python/mypy/pull/19580">19580</a>)</li>
<li>Add cache for types of some expressions (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19505">19505</a>)</li>
<li>Use cache for dictionary expressions (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19536">19536</a>)</li>
<li>Use cache for binary operations (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19523">19523</a>)</li>
<li>Cache types of type objects (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19514">19514</a>)</li>
<li>Avoid duplicate work when checking boolean operations (Ivan
Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19515">19515</a>)</li>
<li>Optimize generic inference passes (Ivan Levkivskyi, PR <a
href="https://redirect.github.com/python/mypy/pull/19501">19501</a>)</li>
<li>Speed up the default plugin (Jukka Lehtosalo, PRs <a
href="https://redirect.github.com/python/mypy/pull/19385">19385</a> and
<a
href="https://redirect.github.com/python/mypy/pull/19462">19462</a>)</li>
<li>Remove nested imports from the default plugin (Ivan Levkivskyi, PR
<a
href="https://redirect.github.com/python/mypy/pull/19388">19388</a>)</li>
<li>Micro‑optimize type expansion (Jukka Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19461">19461</a>)</li>
<li>Micro‑optimize type indirection (Jukka Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19460">19460</a>)</li>
<li>Micro‑optimize the plugin framework (Jukka Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19464">19464</a>)</li>
<li>Avoid temporary set creation in subtype checking (Jukka Lehtosalo,
PR <a
href="https://redirect.github.com/python/mypy/pull/19463">19463</a>)</li>
<li>Subtype checking micro‑optimization (Jukka Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19384">19384</a>)</li>
<li>Return early where possible in subtype check (Stanislav Terliakov,
PR <a
href="https://redirect.github.com/python/mypy/pull/19400">19400</a>)</li>
<li>Deduplicate some types before joining (Stanislav Terliakov, PR <a
href="https://redirect.github.com/python/mypy/pull/19409">19409</a>)</li>
<li>Speed up type checking by caching argument inference context (Jukka
Lehtosalo, PR <a
href="https://redirect.github.com/python/mypy/pull/19323">19323</a>)</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/python/mypy/commit/03fbaa941bccc3a9f8aea796d586603b67119bf2"><code>03fbaa9</code></a>
bump version to 1.18.1 due to wheels failure</li>
<li><a
href="https://github.com/python/mypy/commit/b44a1fbf0cf9fd90fd29d6bcd9f64c55dd2fd4c8"><code>b44a1fb</code></a>
removed +dev from version</li>
<li><a
href="https://github.com/python/mypy/commit/7197a99d1aebb1b7a584f82a53c44efb7dddf136"><code>7197a99</code></a>
Removed Unreleased in the Changelog for Release 1.18 (<a
href="https://redirect.github.com/python/mypy/issues/19827">#19827</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/ee61cec0d654463874ddee3a60914f0a6cd08222"><code>ee61cec</code></a>
Updates to 1.18 changelog (<a
href="https://redirect.github.com/python/mypy/issues/19826">#19826</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/24eed0bd0bb1107ede163ed314082a0f3e7dbbc4"><code>24eed0b</code></a>
Initial changelog for release 1.18 (<a
href="https://redirect.github.com/python/mypy/issues/19818">#19818</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/0ca1f2a7e50ed38eed95ecf8c1f2df1057da902d"><code>0ca1f2a</code></a>
Expose --fixed-format-cache if compiled (<a
href="https://redirect.github.com/python/mypy/issues/19815">#19815</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/2ce1bb225f3ced0ad4b2080af8a9a0eb39f8b38e"><code>2ce1bb2</code></a>
[mypyc] Fix subclass processing in detect_undefined_bitmap (<a
href="https://redirect.github.com/python/mypy/issues/19787">#19787</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/a6b55f061d6a352e7d272ec5bc890650b7187380"><code>a6b55f0</code></a>
feat: new mypyc primitives for weakref.proxy (<a
href="https://redirect.github.com/python/mypy/issues/19217">#19217</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/5a323dd2f8927eb958835e51916402c27ec2f31f"><code>5a323dd</code></a>
Make --allow-redefinition-new argument public (<a
href="https://redirect.github.com/python/mypy/issues/19796">#19796</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/8638eb40aa7b9d3088f17ab005c538c86c752edd"><code>8638eb4</code></a>
[stubtest] temporary <code>--ignore-disjoint-bases</code> flag (<a
href="https://redirect.github.com/python/mypy/issues/19740">#19740</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/python/mypy/compare/v1.17.1...v1.18.1">compare
view</a></li>
</ul>
</details>
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pyproject.toml

@@ -56,7 +56,7 @@ dev = [
     "flake8==7.3.0",
     "flake8-tergeo==25.8.13.0",
     "pylint==3.3.8",
-    "mypy==1.17.1",
+    "mypy==1.18.1",
     "types-hdbcli==2.25.0.20250915",
     "typing-extensions==4.15.0",
     "yesqa==1.5.0",