tests

Add news fragment. #5922

Job	Run time
test_cygwin (39, windows-latest)	16m 2s
collateral (diffcov)	5m 27s
test (3.9, ubuntu-latest)	4m 1s
collateral (docs)	2m 1s
test (3.9, macos-latest)	3m 26s
test (3.9, windows-latest)	4m 4s
test (3.13, ubuntu-latest)	4m 20s
test (3.13, macos-latest)	3m 26s
test (3.13, windows-latest)	4m 6s
test (3.10, ubuntu-latest)	4m 0s
test (3.11, ubuntu-latest)	3m 31s
test (3.12, ubuntu-latest)	3m 26s
test (3.14, ubuntu-latest)	3m 25s
test (pypy3.10, ubuntu-latest, stdlib)	3m 26s
test (ubuntu-latest, 3.10, stdlib)	4m 15s
integration-test	0s
check	4s
release	0s
	1h 9m 0s

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