Test pypa/pyproject-hooks pr 199 #1035

Job	Run time
test_cygwin (39, windows-latest)	16m 41s
test (3.8, ubuntu-latest)	4m 21s
collateral (diffcov)	6m 9s
test (3.8, windows-latest)	13m 27s
collateral (docs)	41s
test (3.12, ubuntu-latest)	6m 2s
collateral (check-extern)	14s
test (3.12, macos-latest)	5m 16s
test (3.12, windows-latest)	10m 55s
test (3.9, ubuntu-latest)	4m 37s
test (3.10, ubuntu-latest)	4m 18s
test (3.11, ubuntu-latest)	4m 8s
test (pypy3.10, ubuntu-latest, stdlib)	7m 49s
test (ubuntu-latest, 3.10, stdlib)	4m 9s
test (3.8, macos-13)	10m 34s
integration-test	0s
check	1s
release	0s
	1h 39m 22s

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