Bump pillow from 8.4.0 to 9.0.0 (#30)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.4.0 to 9.0.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@8.4.0...9.0.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]