Bump pillow from 6.1.0 to 9.0.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.1.0 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@6.1.0...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

@@ -62,7 +62,7 @@ olefile==0.46
 packaging==19.1
 pandas==0.24.2
 pathlib2==2.3.4
-Pillow==6.1.0
+Pillow==9.0.0
 pip-upgrader==1.4.15
 pluggy==0.12.0
 py==1.8.0