Build(deps): Bump pillow from 8.2.0 to 8.3.2 (#441)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.2.0 to 8.3.2.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/8.2.0...8.3.2)

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

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Pipfile

@@ -39,7 +39,7 @@ lxml = "~=4.6.3"
 Markdown = "~=3.3.3"
 msgpack = "~=1.0.2"
 pep517 = "~=0.9.1"
-Pillow = "~=8.2.0"
+Pillow = "~=8.3.2"
 premailer = "~=3.7.0"
 progress = "~=1.5"
 psutil = "~=5.8.0"