add Python 3.12 to all Github work flows #823

Job	Run time
Build and test Linux wheels (python3.8)	10m 55s
Build and test Linux wheels (python3.9)	10m 38s
Build and test Linux wheels (python3.10)	10m 42s
Build and test Linux wheels (python3.11)	10m 50s
Build and test Linux wheels (python3.12)	11m 20s
Build source distribution	15s
Build macOS/x86 wheels (3.8)	7m 6s
Build macOS/x86 wheels (3.9)	5m 38s
Build macOS/x86 wheels (3.10)	7m 16s
Build macOS/x86 wheels (3.11)	6m 7s
Build macOS/x86 wheels (3.12)	10m 3s
Build package from source dist (3.8)	3m 37s
Build package from source dist (3.9)	3m 44s
Build package from source dist (3.10)	3m 30s
Build package from source dist (3.11)	3m 33s
Build package from source dist (3.12)	3m 50s
Test macOS/x86 wheels (3.8)	34s
Test macOS/x86 wheels (3.9)	30s
Test macOS/x86 wheels (3.10)	29s
Test macOS/x86 wheels (3.11)	29s
Test macOS/x86 wheels (3.12)	1m 57s
Upload to PyPI	23s
	1h 53m 26s

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