Bump mypy from 1.4.1 to 1.5.0 (#327)

Bumps [mypy](https://github.com/python/mypy) from 1.4.1 to 1.5.0.
- [Commits](python/mypy@v1.4.1...v1.5.0)

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

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