chore(deps-dev): update mypy requirement from ~=1.5.1 to ~=1.6.1

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [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
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/dev.txt

@@ -3,7 +3,7 @@ pylint~=2.17.5
 pytest~=7.4.2
 pytest-asyncio~=0.21.1
 # pytest-order~=1.0.1
-mypy~=1.5.1
+mypy~=1.6.1
 coverage~=7.3
 pre-commit==3.4.0
 codespell==2.2.5