tests

wip #73

Job	Run time
collateral (diffcov)	48s
collateral (docs)	33s
test_cygwin (39, windows-latest)	5m 3s
ci_setuptools (3.10, ubuntu-latest)	3m 45s
test (3.8, ubuntu-latest)	40s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	2m 11s
test (3.8, macos-latest)	1m 22s
test_msvc_python_mingw	2m 35s
test_msys2_mingw (mingw32, i686, gcc, g++)	2m 34s
test (3.8, windows-latest)	1m 41s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	2m 10s
test (3.12, ubuntu-latest)	44s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	2m 19s
test (3.12, macos-latest)	50s
test (3.12, windows-latest)	1m 53s
test (3.9, ubuntu-latest)	48s
test (3.10, ubuntu-latest)	43s
test (3.11, ubuntu-latest)	39s
test (pypy3.10, ubuntu-latest)	1m 40s
check	2s
release	0s
	33m 0s

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