tests

Add initial support for license expression (PEP 639) #5743

Job	Run time
test_cygwin (39, windows-latest)	3m 26s
collateral (diffcov)	3m 45s
collateral (docs)	1m 48s
test (3.8, ubuntu-latest)	14s
test (3.8, windows-latest)	21s
test (3.13, ubuntu-latest)	11s
test (3.13, macos-latest)	20s
test (3.13, windows-latest)	12s
test (3.9, ubuntu-latest)	14s
test (3.10, ubuntu-latest)	27s
test (3.11, ubuntu-latest)	28s
test (3.12, ubuntu-latest)	27s
test (3.14, ubuntu-latest)	14s
test (pypy3.10, ubuntu-latest, stdlib)	10s
test (ubuntu-latest, 3.10, stdlib)	9s
test (3.8, macos-13)	27s
integration-test	0s
check	3s
release	1s
	12m 57s

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