Release 0.28.0 #3177

Job	Run time
test_min_deps (ubuntu-latest)	39s
test_min_deps (windows-latest)	1m 16s
test_min_deps (macos-latest)	54s
Integration Tests (pdm.minimal.lock)	31s
Integration Tests (pdm.lock)	31s
test (3.10, ubuntu-latest)	1m 6s
test (3.11, ubuntu-latest)	58s
test (3.10, macos-latest)	1m 11s
test (3.10, windows-latest)	1m 44s
test (3.11, macos-latest)	41s
test (3.12, windows-latest)	1m 37s
test (3.13, windows-latest)	2m 15s
test (3.14, ubuntu-latest)	1m 5s
test (3.13, ubuntu-latest)	1m 7s
test (3.11, windows-latest)	1m 27s
test (3.12, ubuntu-latest)	1m 17s
test (3.14, macos-latest)	1m 2s
test (3.14, windows-latest)	1m 32s
test (3.12, macos-latest)	1m 3s
test (3.13, macos-latest)	1m 18s
Combine & check coverage	15s
	23m 29s

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