CI testing

`collections.namedtuple`: add lookaside #228

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Run time

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Job	Run time
pytester (ubuntu-22.04, 3.10, latest)	33s
pytester (ubuntu-22.04, 3.10, nightly)	44s
pytester (macOS-12, 3.10, latest)	45s
pytester (macOS-12, 3.10, nightly)	44s
pytester (windows-2022, 3.10, latest)	39s
pytester (windows-2022, 3.10, nightly)	40s
pytester (ubuntu-22.04, 3.11, latest)	44s
testing-guardian	1m 13s
	6m 2s