Release 0.28.0 #3170

Job	Run time
Integration Tests (pdm.minimal.lock)	32s
Integration Tests (pdm.lock)	26s
test_min_deps (ubuntu-latest)	37s
test_min_deps (macos-latest)	47s
test_min_deps (windows-latest)	1m 20s
test (3.10, ubuntu-latest)	1m 4s
test (3.10, macos-latest)	58s
test (3.11, windows-latest)	1m 33s
test (3.10, windows-latest)	1m 33s
test (3.11, ubuntu-latest)	59s
test (3.12, macos-latest)	2m 9s
test (3.13, windows-latest)	1m 35s
test (3.11, macos-latest)	53s
test (3.12, ubuntu-latest)	1m 5s
test (3.13, ubuntu-latest)	1m 9s
test (3.13, macos-latest)	2m 26s
test (3.12, windows-latest)	1m 40s
test (3.14, macos-latest)	47s
test (3.14, windows-latest)	1m 28s
test (3.14, ubuntu-latest)	1m 6s
Combine & check coverage	14s
	24m 21s

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