v4.2.0
Bump version to 5.0.0
fixup http01_example.py (#10285)
deprecate python 3.9 (#10390)
Docs: Reset requirements.txt path (#9877)
Update Copyright notice in subpackages LICENSE.
Why do we have this? It means warnings aren't filtered in acme tests (#10267)
Fix ACME module description
Pin readthedocs deps (#9083)
Release 4.2.0