Bump the dependencies group with 1 update (#256)

Bumps the dependencies group with 1 update: [mypy](https://github.com/python/mypy).

- [Commits](python/mypy@v1.4.1...v1.5.0)

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

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