Tests

TEST: Fix 313 #334

Job	Run time
Test mypyc suite with 32-bit Python	7m 4s
Test suite with Python nightly	12m 8s
Test suite with py38-ubuntu, mypyc-compiled	6m 15s
Test suite with py38-windows-64	17m 52s
Test suite with py39-ubuntu	17m 31s
Test suite with py310-ubuntu	15m 31s
Test suite with py311-ubuntu, mypyc-compiled	6m 12s
Test suite with py312-ubuntu, mypyc-compiled	6m 37s
mypyc runtime tests with py39-macos	4m 11s
mypyc runtime tests with py38-debug-build-ubuntu	3m 29s
Type check our own code (py38-ubuntu)	1m 43s
Type check our own code (py38-windows-64)	2m 38s
Formatting and code style with Black + ruff	35s
	1h 41m 46s

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