build

Test contingency up to 30% #1880

Job	Run time
py39 (windows)	12m 59s
docs	1m 11s
py39 (ubuntu)	11m 47s
py311 (ubuntu)	11m 36s
py311 (macos)	7m 29s
py38 (ubuntu)	11m 18s
check	43s
py310 (ubuntu)	12m 10s
py310 (windows)	13m 53s
py311 (windows)	14m 26s
Deploy docs to GitHub Pages	0s
Upload coverage to Coveralls	0s
	1h 37m 32s

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