Merge pull request #137 from sbidoul/support-pip-less-venv #519

Job	Run time
Test with python 3.6 on windows-latest	1m 54s
Test with python 3.7 on windows-latest	1m 18s
Test with python 3.8 on windows-latest	9m 38s
Test with python 3.11 on windows-latest	10m 34s
Test with python 3.6 on macos-latest	1m 17s
Test with python 3.7 on macos-latest	52s
Test with python 3.8 on macos-latest	6m 25s
Test with python 3.11 on macos-latest	4m 11s
Test with python 2.7 on ubuntu-20.04	30s
Test with python 3.6 on ubuntu-20.04	36s
Test with python 3.7 on ubuntu-latest	37s
Test with python 3.8 on ubuntu-latest	3m 43s
Test with python 3.9 on ubuntu-latest	3m 51s
Test with python 3.10 on ubuntu-latest	3m 46s
Test with python 3.11 on ubuntu-latest	3m 52s
	53m 4s

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