Bump pillow from 2.9.0 to 9.3.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 2.9.0 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@2.9.0...9.3.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -5,7 +5,7 @@ wtf-peewee
 mongoengine<0.11.0
 pymongo==2.8
 flask-mongoengine==0.8.2
-pillow==2.9.0
+pillow==9.3.0
 Babel<=1.3
 flask-babelex
 shapely==1.5.9

setup.py

@@ -59,7 +59,7 @@ def grep(attrname):
     install_requires=install_requires,
     tests_require=[
         'nose>=1.0',
-        'pillow==2.9.0',
+        'pillow==9.3.0',
         'mongoengine',
         'pymongo',
         'wtf-peewee',