Bump pillow from 8.3.2 to 9.0.0

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](python-pillow/Pillow@8.3.2...9.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@ sentencepiece==0.1.96
 tqdm==4.62.1
 librosa==0.8.1
 PyYAML==5.4.1
-Pillow==8.3.2
+Pillow==9.0.0
 black==21.7b0
 flake8==3.9.2
 sounddevice==0.4.3