Bump pillow from 7.2.0 to 9.3.0 in /requirements

Bumps [pillow](https://github.com/python-pillow/Pillow) from 7.2.0 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](python-pillow/Pillow@7.2.0...9.3.0)

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

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

Author: dependabot[bot]

requirements/dev-py36.txt

@@ -52,7 +52,7 @@ pep8==1.7.1               # via -r requirements/dev.in
 pexpect==4.8.0            # via ipython
 phonenumberslite==8.12.10  # via small-small-hr
 pickleshare==0.7.5        # via ipython
-pillow==7.2.0             # via small-small-hr
+pillow==9.3.0             # via small-small-hr
 pluggy==0.13.1            # via tox
 pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython

requirements/dev-py37.txt

@@ -50,7 +50,7 @@ pep8==1.7.1               # via -r requirements/dev.in
 pexpect==4.8.0            # via ipython
 phonenumberslite==8.12.10  # via small-small-hr
 pickleshare==0.7.5        # via ipython
-pillow==7.2.0             # via small-small-hr
+pillow==9.3.0             # via small-small-hr
 pluggy==0.13.1            # via tox
 pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython

requirements/dev-py38.txt

@@ -49,7 +49,7 @@ pep8==1.7.1               # via -r requirements/dev.in
 pexpect==4.8.0            # via ipython
 phonenumberslite==8.12.10  # via small-small-hr
 pickleshare==0.7.5        # via ipython
-pillow==7.2.0             # via small-small-hr
+pillow==9.3.0             # via small-small-hr
 pluggy==0.13.1            # via tox
 pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython