Release 0.28.0 (#1368) #3179

Job	Run time
test_min_deps (macos-latest)	1m 3s
test_min_deps (windows-latest)	1m 8s
test_min_deps (ubuntu-latest)	42s
Integration Tests (pdm.minimal.lock)	24s
test (3.12, windows-latest)	1m 29s
Integration Tests (pdm.lock)	26s
test (3.10, ubuntu-latest)	1m 4s
test (3.10, windows-latest)	1m 30s
test (3.11, ubuntu-latest)	1m 5s
test (3.10, macos-latest)	1m 24s
test (3.11, macos-latest)	1m 7s
test (3.12, macos-latest)	51s
test (3.12, ubuntu-latest)	1m 4s
test (3.14, macos-latest)	55s
test (3.13, macos-latest)	59s
test (3.13, ubuntu-latest)	1m 8s
test (3.14, windows-latest)	1m 39s
test (3.11, windows-latest)	1m 34s
test (3.13, windows-latest)	1m 38s
test (3.14, ubuntu-latest)	1m 6s
Combine & check coverage	18s
	22m 34s

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