Rollback to actions/checkout@v3 #271

Job	Run time
Create sdist and Python 3 Wheel	35s
Create Python 2 Wheel	46s
Test Documentation	39s
test_typing (sdist)	34s
test_typing (wheel)	31s
Test Package (2.7, sdist)	19s
Test Package (2.7, wheel)	15s
Test Package (3.3, sdist)	21s
Test Package (3.3, wheel)	23s
Test Package (3.4, sdist)	18s
Test Package (3.4, wheel)	22s
Test Package (3.5, sdist)	21s
Test Package (3.5, wheel)	17s
Test Package (3.6, sdist)	17s
Test Package (3.6, wheel)	20s
Test Package (3.7, sdist)	17s
Test Package (3.7, wheel)	19s
Test Package (3.8, sdist)	17s
Test Package (3.8, wheel)	20s
Test Package (3.9, sdist)	22s
Test Package (3.9, wheel)	24s
Test Package (3.10, sdist)	26s
Test Package (3.10, wheel)	26s
Test Package (3.11, sdist)	28s
Test Package (3.11, wheel)	27s
Test Package (3.12, sdist)	29s
Test Package (3.12, wheel)	27s
	11m 0s

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