Bump types-mock from 5.1.0.2 to 5.1.0.3

Bumps [types-mock](https://github.com/python/typeshed) from 5.1.0.2 to 5.1.0.3.
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-mock
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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