chore(deps): bump pillow from 8.0.0 to 8.1.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.0.0 to 8.1.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@8.0.0...8.1.1)

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

requirements.txt

@@ -11,7 +11,7 @@ idna==2.10
 incremental==17.5.0
 names==0.3.0
 notify2==0.3.1
-Pillow==8.0.0
+Pillow==8.1.1
 pillowcase==2.0.0
 progressbar2==3.53.1
 pyasn1==0.4.8