use python 3.12 #918

Job	Run time
lint	48s
build	37s
cleanup_buckets	29s
test-docker	1m 8s
test-windows-bundle (windows-2019)	10m 47s
test-linux-bundle	7m 28s
test (ubuntu-latest, 3.7)	41s
test-windows-bundle (windows-latest)	9m 55s
test (ubuntu-latest, 3.8)	35s
test (ubuntu-latest, 3.9)	36s
test (ubuntu-latest, 3.10)	50s
test (ubuntu-latest, 3.11)	52s
test (ubuntu-latest, 3.12)	6m 10s
test (ubuntu-latest, pypy-3.10-nightly)	1m 52s
test (macos-latest, 3.7)	52s
test (macos-latest, 3.8)	1m 3s
test (macos-latest, 3.9)	1m 21s
test (macos-latest, 3.10)	49s
test (macos-latest, 3.11)	1m 13s
test (macos-latest, 3.12)	6m 22s
test (windows-latest, 3.7)	1m 29s
test (windows-latest, 3.8)	1m 34s
test (windows-latest, 3.9)	1m 19s
test (windows-latest, 3.10)	1m 13s
test (windows-latest, 3.11)	1m 48s
test (windows-latest, 3.12)	7m 32s
doc	1m 0s
	1h 10m 23s

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