Tests

feat: new mypyc primitive for weakref.ref #15965

Job	Run time
Test mypyc suite with 32-bit Python	1m 22s
Test suite with py39-ubuntu, mypyc-compiled	1m 34s
Test suite with py39-windows-64	1m 19s
Test suite with py310-ubuntu	1m 37s
Test suite with py311-ubuntu	1m 35s
Test suite with py312-ubuntu, mypyc-compiled	1m 35s
Test suite with py313-ubuntu, mypyc-compiled	1m 35s
Test suite with py314-dev-ubuntu	1m 35s
mypyc runtime tests with py39-macos	1m 35s
Type check our own code (py39-ubuntu)	1m 33s
Type check our own code (py39-windows-64)	1m 22s
Formatting and code style with Black + ruff	1m 34s
	18m 16s

Provide feedback