Add support for >3.12 and no-GIL builds #258

Job	Run time
Run test with Python 3.14-dev on ubuntu-latest	12m 47s
Run test with Python 3.13-dev on ubuntu-latest	2m 55s
Run test with Python 3.12 on ubuntu-latest	38s
Run test with Python 3.11 on ubuntu-latest	27s
Run test with Python 3.10 on ubuntu-latest	31s
Run test with Python 3.9 on ubuntu-latest	32s
Run test with Python 3.8 on ubuntu-latest	30s
Run test with Python 3.14-dev on windows-latest	49s
Run test with Python 3.13-dev on windows-latest	2m 27s
Run test with Python 3.12 on windows-latest	1m 24s
Run test with Python 3.11 on windows-latest	1m 15s
Run test with Python 3.10 on windows-latest	1m 17s
Run test with Python 3.9 on windows-latest	1m 0s
Run test with Python 3.8 on windows-latest	53s
Run test with Python 3.14-dev on macos-latest	24s
Run test with Python 3.13-dev on macos-latest	2m 8s
Run test with Python 3.12 on macos-latest	25s
Run test with Python 3.11 on macos-latest	25s
Run test with Python 3.10 on macos-latest	22s
Run test with Python 3.9 on macos-latest	51s
Run test with Python 3.8 on macos-latest	1m 36s
	33m 36s

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