Bump pillow from 8.1.1 to 8.2.0 (#203)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.1.1 to 8.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@8.1.1...8.2.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -15,7 +15,7 @@ googleapis-common-protos<2,>=1.52.0
 grpcio<2,>=1.34.0
 idna==2.10
 langdetect==1.0.8
-Pillow==8.1.1
+Pillow==8.2.0
 # Required by fbactiveads
 prometheus_client>=0.9
 protobuf>=3.14.0