Bump mypy from 0.910 to 0.930 (#467)

Bumps [mypy](https://github.com/python/mypy) from 0.910 to 0.930.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](https://github.com/python/mypy/compare/v0.910...v0.930

)

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

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

requirements.dev.txt

@@ -2,7 +2,7 @@
 # https://github.com/PyCQA/pylint/issues/3139
 pylint==2.10.2
 flake8==4.0.1
-mypy==0.910
+mypy==0.930
 nose==1.3.7
 pytest==6.2.5
 pytest-watch==4.2.0