Bump pillow from 3.2.0 to 8.3.2

Bumps [pillow](https://github.com/python-pillow/Pillow) from 3.2.0 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@3.2.0...8.3.2)

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

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

Author: dependabot[bot]

requirements.txt

@@ -35,7 +35,7 @@ pdfrw==0.2
 pelican==3.6.3
 pexpect==4.0.1
 pickleshare==0.7.2
-Pillow==7.1.0
+Pillow==8.3.2
 ptyprocess==0.5.1
 #py3minepi==0.0.1
 pyasn1==0.4.5