Bump pillow from 8.0.1 to 9.0.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.0.1 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@8.0.1...9.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -22,7 +22,7 @@ numba==0.52.0
 numpy==1.19.4
 packaging==20.8
 pikepdf==2.2.2
-Pillow==8.0.1
+Pillow==9.0.0
 pooch==1.3.0
 proglog==0.1.9
 psutil==5.8.0