Merge branch 'ci' #251

Job	Run time
test-ubuntu-system-python (ubuntu-latest)	3m 38s
build (ubuntu-20.04, 3.9)	2m 20s
build (ubuntu-20.04, 3.x)	2m 39s
build (ubuntu-latest, 3.9)	2m 24s
build (ubuntu-latest, 3.x)	2m 45s
build (macos-13, 3.9)	4m 4s
build (macos-13, 3.x)	4m 10s
build (macos-latest, 3.9)	3m 3s
build (macos-latest, 3.x)	1m 37s
build (windows-2019, 3.9)	3m 13s
build (windows-2019, 3.x)	4m 5s
build (windows-latest, 3.9)	3m 15s
build (windows-latest, 3.x)	3m 31s
	40m 44s

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