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] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 lmdb==0.97
 numpy==1.17.2
-Pillow==6.1.0
+Pillow==9.0.0
 six==1.12.0
 torch==1.2.0
 torchvision==0.4.0