Allowing Python 3.11 #423

Job	Run time
Build (3.9, ubuntu-latest)	6m 3s
Build documentation	11m 4s
Build (3.10, ubuntu-latest)	6m 9s
Build (3.11, ubuntu-latest)	7m 23s
Build (3.9, macos-latest)	6m 12s
Build (3.10, macos-latest)	13m 16s
Build (3.11, macos-latest)	9m 54s
Build (3.9, windows-latest)	14m 35s
Build (3.10, windows-latest)	14m 28s
Build (3.11, windows-latest)	15m 52s
Indicate completion to coveralls.io	16s
	1h 45m 12s

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