tests

Merge https://github.com/jaraco/skeleton #1087

Job	Run time
ci_setuptools (3.10, ubuntu-latest)	4m 12s
collateral (diffcov)	44s
test_cygwin (39, windows-latest)	4m 40s
test (3.8, ubuntu-latest)	48s
collateral (docs)	27s
test (3.8, macos-latest)	1m 13s
test_msvc_python_mingw	2m 8s
test (3.8, windows-latest)	1m 43s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	1m 37s
test_msys2_mingw (mingw32, i686, gcc, g++)	1m 51s
test (3.12, ubuntu-latest)	56s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	1m 36s
test (3.12, macos-latest)	58s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	1m 43s
test (3.12, windows-latest)	1m 54s
test (3.9, ubuntu-latest)	50s
test (3.10, ubuntu-latest)	49s
test (3.11, ubuntu-latest)	40s
test (pypy3.10, ubuntu-latest)	1m 29s
check	4s
release	0s
	30m 22s

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