Create source distribution with --sdist #1914

Job	Run time
Wheel on macos-13 py-3.8	3m 0s
Wheel on ubuntu-latest py-3.8	2m 53s
Wheel on windows-latest py-3.8	3m 24s
Checks	54s
coverage	8m 22s
Run fuzz targets (macos-13, 3.8)	26m 40s
Unit tests (macos-13, 3.8)	6m 49s
Run fuzz targets (ubuntu-latest, 3.8)	20m 55s
Unit tests (ubuntu-latest, 3.8)	3m 29s
Unit tests (windows-latest, 3.8)	6m 53s
Upload to PyPI	31s
	1h 23m 50s

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