Release 0.28.0 #3174

Job	Run time
test_min_deps (macos-latest)	1m 8s
test_min_deps (ubuntu-latest)	48s
test_min_deps (windows-latest)	1m 29s
Integration Tests (pdm.minimal.lock)	31s
Integration Tests (pdm.lock)	31s
test (3.10, windows-latest)	1m 41s
test (3.11, ubuntu-latest)	1m 9s
test (3.11, windows-latest)	1m 35s
test (3.10, macos-latest)	58s
test (3.10, ubuntu-latest)	1m 4s
test (3.12, macos-latest)	1m 41s
test (3.11, macos-latest)	1m 11s
test (3.13, macos-latest)	40s
test (3.14, windows-latest)	1m 33s
test (3.12, windows-latest)	1m 56s
test (3.13, ubuntu-latest)	1m 23s
test (3.14, ubuntu-latest)	1m 7s
test (3.14, macos-latest)	46s
test (3.13, windows-latest)	1m 36s
test (3.12, ubuntu-latest)	1m 11s
Combine & check coverage	13s
	24m 11s

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