Change to Python 3.8 (#877) #717

Job	Run time
linters (3.9, ubuntu-latest)	1m 57s
Testing on Python 3.8 (ubuntu-latest)	2m 10s
Testing on Python 3.8 (macOS-latest)	4m 5s
Testing on Python 3.8 (windows-latest)	2m 20s
Testing on Python 3.9 (ubuntu-latest)	2m 2s
Testing on Python 3.9 (macOS-latest)	2m 26s
Testing on Python 3.9 (windows-latest)	2m 24s
Testing on Python 3.10 (ubuntu-latest)	2m 4s
Testing on Python 3.10 (macOS-latest)	3m 29s
Testing on Python 3.10 (windows-latest)	2m 18s
Testing on Python 3.11 (ubuntu-latest)	1m 58s
Testing on Python 3.11 (macOS-latest)	4m 1s
Testing on Python 3.11 (windows-latest)	2m 35s
	33m 49s

Provide feedback