Add Python 3.13, drop Python 3.8, update tool versions, add twinecheck #181

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Run time

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Job	Run time
tests (3.9)	44s
tests (3.10)	37s
tests (3.11)	37s
tests (3.12)	42s
tests (3.13)	52s
tests (pypy3.10)	1m 2s
	4m 34s