Re-enable PyPI and other stuff. #16

Job	Run time
Check Python 3.9 on ubuntu-20.04	10m 40s
Check Python 3.10 on ubuntu-20.04	10m 9s
Check Python 3.11 on ubuntu-20.04	10m 2s
Check Python 3.12 on ubuntu-20.04	11m 26s
Check Python 3.9 on macos-latest	8m 54s
Check Python 3.10 on macos-latest	9m 0s
Check Python 3.11 on macos-latest	10m 45s
Check Python 3.12 on macos-latest	9m 56s
Check Python 3.9 on windows-latest	15m 48s
Check Python 3.10 on windows-latest	14m 46s
Check Python 3.11 on windows-latest	15m 3s
Check Python 3.12 on windows-latest	16m 28s
	2h 22m 57s

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