⬆ Update mypy requirement from 0.930 to 0.971 (#380)

⬆ Update mypy requirement from 0.930 to 0.971 (#380)

Update mypy requirement from 0.930 to 0.971

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](https://github.com/python/mypy/compare/v0.930...v0.971)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
...

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