Tests

Fix doc build issues #751

Job	Run time
build	2m 24s
Test (ubuntu, 3.9, latest, ipympl*.whl)	2m 57s
Test (macos, 3.13, latest, ipympl*.whl)	1m 38s
Test (ubuntu, 3.9, 3.5, ipympl*.whl)	2m 34s
Test (ubuntu, 3.11, latest, ipympl*.tar.gz)	3m 7s
Test (ubuntu, 3.13, latest, ipympl*.whl)	2m 48s
Test (macos, 3.9, latest, ipympl*.whl)	2m 0s
	17m 28s

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