tests

chore: add py314, remove py39 (#33) #230

Job	Run time
py3.14 unit tests	14s
py3.10 unit tests	15s
style	35s
py3.13 unit tests	13s
py3.12 unit tests	12s
minimum dependency versions	14s
py3.11 unit tests	13s
doc	13s
	2m 9s

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