Add `--no-obsolete` flag #946

Job	Run time
Test (3.8, ubuntu-latest)	41s
Lint	4m 22s
Build documentation	22s
Test (3.8, macos-latest)	1m 23s
Test (3.8, windows-latest)	1m 16s
Test (3.9, ubuntu-latest)	28s
Test (3.9, macos-latest)	24s
Test (3.9, windows-latest)	1m 6s
Test (3.10, ubuntu-latest)	38s
Test (3.10, macos-latest)	29s
Test (3.10, windows-latest)	1m 33s
Test (3.11, ubuntu-latest)	34s
Test (3.11, macos-latest)	33s
Test (3.11, windows-latest)	1m 16s
Build standalone (ubuntu-latest)	1m 16s
Build standalone (macos-14)	31s
Build package	12s
Build standalone (macos-13)	1m 1s
Build standalone (windows-latest)	1m 48s
Build final distribution	30s
Release	0s
Upload to PyPI	0s
	20m 23s

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