build(deps): bump pillow from 6.2.0 to 9.3.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.2.0 to 9.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@6.2.0...9.3.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@ Flask==1.0.3
 https://download.pytorch.org/whl/cpu/torch-1.1.0-cp37-cp37m-linux_x86_64.whl
 https://download.pytorch.org/whl/cpu/torchvision-0.3.0-cp37-cp37m-linux_x86_64.whl
 numpy==1.16.4
-Pillow==6.2.0
+Pillow==9.3.0
 nltk==3.5
 demoji==0.2.0
 gunicorn==20.0.4