I don't like huge setup.py with a lot of commas, brackets, quotes, etc. setuptools allows to move almost every static piece of setup.py into setup.cfg. The only parts that cannot be moved easily are Babel's message_extractors and extras_requires that parse requirements.txt.

I would say that in this way, metadata is much more readable. So I'd like to hear your opinion and don't mind closing this PR if nobody else likes this change 😄