Bump pillow from 8.3.2 to 9.0.0 (#41)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.3.2 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](https://github.com/python-pillow/Pillow/compare/8.3.2...9.0.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:production
...

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pyproject.toml

@@ -22,7 +22,7 @@ psycopg2 = "^2.8.6"
 rarfile = "^4.0"
 coverage = "^5.5"
 django-extensions = "^3.1.3"
-Pillow = "^8.2.0"
+Pillow = "^9.0.0"
 django-imagekit = "^4.0.2"
 PyMuPDF = "^1.18.13"
 django-bootstrap4 = "^3.0.0"