Bump pillow from 9.0.0 to 9.4.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 9.0.0 to 9.4.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@9.0.0...9.4.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -3,7 +3,7 @@ librosa==0.8.1
 numpy==1.22.1
 matplotlib==3.5.1
 jupyterlab==3.2.5
-pillow==9.0.0
+pillow==9.4.0
 gizeh==0.1.11
 ffmpeg==1.4
 coveralls

setup.py

@@ -32,7 +32,7 @@
             "numpy==1.22.1",
             "matplotlib==3.5.1",
             "jupyterlab==3.2.5",
-            "pillow==9.0.0",
+            "pillow==9.4.0",
             "gizeh==0.1.11",
             "ffmpeg==1.4",
             "coveralls",