Bump mypy from 0.770 to 0.942 (#4)

Bumps [mypy](https://github.com/python/mypy) from 0.770 to 0.942.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.770...v0.942)

---
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>

Author: dependabot[bot]

requirements_dev.txt

@@ -1,7 +1,7 @@
 -r requirements.txt
 black==22.3.0
 flake8==4.0.1
-mypy==0.770
+mypy==0.942
 pydocstyle==6.1.1
 pylint==2.13.7
 pre-commit==2.18.1