Bump pillow from 6.2.1 to 9.3.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.2.1 to 9.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/6.2.1...9.3.0)

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

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

requirements.txt

@@ -73,7 +73,7 @@ pbr==5.4.3
 pexpect==4.7.0
 pickleshare==0.7.5
 pigpio==1.44
-Pillow==6.2.1
+Pillow==9.3.0
 pipenv==2018.11.26
 pkginfo==1.5.0.1
 pocket==0.3.6
@@ -226,7 +226,7 @@ pbr==5.4.3
 pexpect==4.7.0
 pickleshare==0.7.5
 pigpio==1.44
-Pillow==6.2.1
+Pillow==9.3.0
 pipenv==2018.11.26
 pkginfo==1.5.0.1
 pocket==0.3.6