tests

Merge imio in as `image_io` submodule #190

Job	Run time
Check Linting	16s
Check Manifest	20s
ubuntu-latest py3.9	1m 8s
ubuntu-latest py3.10	1m 12s
ubuntu-latest py3.11	1m 7s
macos-latest py3.11	1m 22s
windows-latest py3.11	1m 18s
Build source distribution	0s
Publish build distributions	0s
	6m 43s

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