Bump mypy from 1.5.1 to 1.6.1

Bumps [mypy](https://github.com/python/mypy) from 1.5.1 to 1.6.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.5.1...v1.6.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

dev-requirements.txt

@@ -12,7 +12,7 @@ flake8~=6.1;python_version>="3.8"
 flaky~=3.7
 freezegun~=1.2
 ipdb~=0.13.13
-mypy==1.5.1  # patch updates have historically introduced breaking changes
+mypy==1.6.1  # patch updates have historically introduced breaking changes
 pip-tools~=7.3
 pre-commit~=3.4
 pre-commit-hooks~=4.4