Bump mypy from 1.5.0 to 1.5.1 (#230)

Bumps [mypy](https://github.com/python/mypy) from 1.5.0 to 1.5.1.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/python/mypy/commit/de4f2ad99c88b885677247534dcec335621ade4d"><code>de4f2ad</code></a>
[Release 1.5] Bump version to 1.5.1 to pick up last 2 CPs</li>
<li><a
href="https://github.com/python/mypy/commit/2ff7c0de571d434a9a1f82fa183d32fa32999b40"><code>2ff7c0d</code></a>
[release 1.5] stubtest: Fix <code>__mypy-replace</code> false positives
(<a
href="https://redirect.github.com/python/mypy/issues/15689">#15689</a>)
(<a
href="https://redirect.github.com/python/mypy/issues/15751">#15751</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/373b73abeb14fdd1f3021f4c27fe1721d2986ed4"><code>373b73a</code></a>
[Release 1.5] Update typing_extensions stubs (<a
href="https://redirect.github.com/python/mypy/issues/15745">#15745</a>)</li>
<li>See full diff in <a
href="https://github.com/python/mypy/compare/v1.5.0...v1.5.1">compare
view</a></li>
</ul>
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requirements-dev.txt

@@ -9,5 +9,5 @@ pytest-asyncio==0.21.1
 httpx==0.24.1 # needed for tests as a replacement of requests in TestClient
 types-requests==2.31.0.2
 types-redis==4.6.0.3
-mypy==1.5.0
+mypy==1.5.1
 types-pytz==2023.3.0.1