Bump mypy from 1.4.0 to 1.4.1 (#342)

Bumps [mypy](https://github.com/python/mypy) from 1.4.0 to 1.4.1.
- [Commits](python/mypy@v1.4.0...v1.4.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-dev.txt

@@ -5,7 +5,7 @@ flake8-bugbear==23.6.5; implementation_name=="cpython"
 flake8-quotes==3.3.2; implementation_name=="cpython"
 flake8==6.0.0; implementation_name=="cpython"
 isort==5.12.0; implementation_name=="cpython"
-mypy==1.4.0; implementation_name=="cpython"
+mypy==1.4.1; implementation_name=="cpython"
 pyroma==4.2; implementation_name=="cpython"
 pytest-asyncio==0.21.0
 pytest-cov==4.1.0