Add python3.8 linux wheel builds #222

Job	Run time
initialize	5s
build_sdist (ubuntu-22.04, 3.9)	27s
build (ubuntu-22.04, 3.8, cp38, false)	19m 33s
lint (ubuntu-22.04, 3.9)	29s
build (ubuntu-22.04, 3.9, cp39, false)	20m 13s
build (ubuntu-22.04, 3.10, cp310, false)	19m 58s
build (ubuntu-22.04, 3.11, cp311, false)	17m 47s
build (macos-14, 3.11, cp311, false)	17m 20s
test_sdist	0s
test (ubuntu-22.04, 3.11, false)	2m 1s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy>=2)	45s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy<2)	56s
	1h 39m 34s

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