Bump pillow from 6.2.2 to 8.0.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.2.2 to 8.0.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@6.2.2...8.0.1)

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

Author: dependabot[bot]

requirements.txt

@@ -52,7 +52,7 @@ nodeenv==1.3.0
 oic==1.1.2
 passlib==1.7.1
 pathspec==0.8.0
-Pillow==6.2.2
+Pillow==7.1.0
 pre-commit==1.10.1
 psycopg2==2.8.5
 pyasn1==0.4.2