Foundations for non-linear solver and polymorphic application #10175

Job	Run time
Test mypyc suite with 32-bit Python	15m 50s
Test suite with Python nightly	18m 53s
Test suite with py37-windows-64	32m 46s
Test suite with py38-ubuntu	23m 29s
Test suite with py39-ubuntu	20m 13s
Test suite with py37-ubuntu, mypyc-compiled	22m 56s
Test suite with py310-ubuntu, mypyc-compiled	19m 37s
Test suite with py310-ubuntu	20m 51s
Test suite with py311-ubuntu, mypyc-compiled	18m 9s
mypyc runtime tests with py37-macos	7m 47s
mypyc runtime tests with py37-debug-build-ubuntu	6m 56s
Type check our own code (py37-ubuntu)	2m 44s
Type check our own code (py37-windows-64)	2m 49s
Formatting with Black + isort and code style with flake8	1m 39s
	3h 34m 39s

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