Bump babel from 2.7.0 to 2.9.0 (#4820)

Bumps [babel](https://github.com/python-babel/babel) from 2.7.0 to 2.9.0.
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES)
- [Commits](python-babel/babel@v2.7.0...v2.9.0)

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requirements_common.txt

@@ -1,5 +1,5 @@
 amightygirl.paapi5-python-sdk==1.0.0
-Babel==2.7.0
+Babel==2.9.0
 beautifulsoup4==4.6.3
 DBUtils==1.3
 Deprecated==1.2.11