Bump pillow from 8.1.1 to 8.2.0 (#305)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.1.1 to 8.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/8.1.1...8.2.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.lock.txt

@@ -44,7 +44,7 @@ Markdown==3.3.3
 MarkupSafe==1.1.1
 packaging==20.9
 passlib==1.7.4
-Pillow==8.1.1
+Pillow==8.2.0
 pluggy==0.13.1
 prompt-toolkit==3.0.14
 psycopg2==2.8.6