Bump pyupgrade from 3.2.3 to 3.3.1 (#257)

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 3.2.3 to 3.3.1.
- [Release notes](https://github.com/asottile/pyupgrade/releases)
- [Commits](asottile/pyupgrade@v3.2.3...v3.3.1)

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

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