Upgrade to 3.10 syntax (#1341) #3080

Job	Run time
Integration Tests (pdm.minimal.lock)	33s
test_min_deps (windows-latest)	3m 19s
test_min_deps (macos-latest)	57s
Integration Tests (pdm.lock)	34s
test_min_deps (ubuntu-latest)	1m 1s
test (3.11, windows-latest)	1m 48s
test (3.10, macos-latest)	1m 37s
test (3.10, windows-latest)	2m 16s
test (3.11, ubuntu-latest)	1m 8s
test (3.10, ubuntu-latest)	1m 18s
test (3.13, windows-latest)	2m 0s
test (3.13, ubuntu-latest)	1m 23s
test (3.14, macos-latest)	1m 8s
test (3.12, windows-latest)	2m 4s
test (3.14, ubuntu-latest)	1m 24s
test (3.14, windows-latest)	2m 2s
test (3.11, macos-latest)	46s
test (3.12, ubuntu-latest)	1m 18s
test (3.13, macos-latest)	1m 3s
test (3.12, macos-latest)	46s
Combine & check coverage	13s
	28m 38s

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