Tests

narrow to literal value #1915

Job	Run time
Test mypyc suite with 32-bit Python	7m 14s
Test suite with py38-ubuntu, mypyc-compiled	1m 36s
Test suite with py38-windows-64	32m 37s
Test suite with py39-ubuntu	31m 2s
Test suite with py310-ubuntu	28m 26s
Test suite with py311-ubuntu, mypyc-compiled	1m 10s
Test suite with py312-ubuntu, mypyc-compiled	1m 14s
Test suite with py313-ubuntu, mypyc-compiled	1m 23s
mypyc runtime tests with py39-macos	5m 48s
Type check our own code (py38-ubuntu)	2m 5s
Type check our own code (py38-windows-64)	2m 46s
Formatting and code style with Black + ruff	1m 4s
	1h 56m 25s

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