Tests

Bump ast-serialize version to 0.3.0 only (#21391) #22082

Job	Run time
Test mypyc suite with 32-bit Python	11m 7s
Test suite with py311-ubuntu	9m 31s
Test suite with py314-ubuntu, mypyc-compiled	16m 17s
Test suite with py312-ubuntu	9m 59s
Test suite with py314t-ubuntu, mypyc-compiled	17m 53s
mypyc runtime tests with py310-ubuntu	6m 56s
Test suite with py310-ubuntu, mypyc-compiled	15m 49s
Parallel tests with py314-ubuntu, interpreted	25m 43s
Test suite with py313-ubuntu, mypyc-compiled	15m 21s
Formatting and code style with Black + ruff	1m 54s
Test suite with py314-windows-64	27m 58s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 49s
mypyc runtime tests with py313-macos	6m 15s
Parallel tests with py314-windows-64, interpreted	10m 24s
Type check our own code (py310-windows-64)	1m 48s
Type check our own code (py310-ubuntu)	1m 8s
	3h 25m 52s

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