Bump pillow from 8.3.1 to 8.3.2

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.3.1 to 8.3.2.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@8.3.1...8.3.2)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -12,4 +12,4 @@ pur==5.4.2
 wheel==0.36.2
 setuptools==57.4.0
 twine==3.4.2
-pillow==8.3.1
+pillow==8.3.2