Bump mypy from 1.6.0 to 1.6.1

Bumps [mypy](https://github.com/python/mypy) from 1.6.0 to 1.6.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.6.0...v1.6.1)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 blue==0.9.1
 isort==5.12.0
-mypy==1.6.0
+mypy==1.6.1
 pip-chill==1.0.3
 pygithub==2.1.1
 pytest-cov==4.1.0