tests

Allow testing resources with multiple extensions (#32) #221

Job	Run time
doc	13s
style	33s
minimum dependency versions	17s
py3.13 unit tests	14s
py3.11 unit tests	15s
py3.10 unit tests	15s
py3.9 unit tests	14s
py3.12 unit tests	16s
	2m 17s

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