Test pypa/pyproject-hooks pr 199 #1036

Job	Run time
test_cygwin (39, windows-latest)	1m 16s
collateral (diffcov)	1m 32s
test (3.8, ubuntu-latest)	1m 30s
collateral (docs)	44s
test (3.8, windows-latest)	1m 17s
collateral (check-extern)	13s
test (3.12, ubuntu-latest)	1m 29s
test (3.12, macos-latest)	1m 34s
test (3.12, windows-latest)	1m 15s
test (3.9, ubuntu-latest)	1m 55s
test (3.10, ubuntu-latest)	1m 31s
test (3.11, ubuntu-latest)	1m 31s
test (pypy3.10, ubuntu-latest, stdlib)	1m 58s
test (ubuntu-latest, 3.10, stdlib)	1m 32s
test (3.8, macos-13)	1m 30s
integration-test	1s
check	2s
release	1s
	20m 51s

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