Use `PyType_GetDict` in Python 3.12+ #900

Job	Run time
Build Source Distribution	0s
Build wheels on ubuntu-latest	7m 2s
Build wheels on macos-13	6m 0s
Build wheels on windows-latest	5m 14s
Lint and ruff code	1m 11s
upload_pypi	0s
	19m 27s

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