build

Merge pull request #615 from nose-devs/fix-config-conditional #750

Job	Run time
run tests from packaged source	42s
typing (mypy)	29s
python=3.8 os=ubuntu-latest	1m 1s
python=3.9 os=ubuntu-latest	53s
python=3.10 os=ubuntu-latest	58s
python=3.11 os=ubuntu-latest	57s
python=3.12 os=ubuntu-latest	1m 2s
python=3.13 os=ubuntu-latest	1m 18s
python=pypy-3.9 os=ubuntu-latest	2m 51s
python=3.x os=windows-latest	1m 39s
python=3.x os=macos-latest	40s
	12m 30s

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