macOS: Fix test_pythoninfo.GetInfoTests, stop marking as experimental

[maurycy]

ref #422

[maurycy]

pyperformance/pyperformance/_pythoninfo.py

Lines 84 to 92 in 74a5b03

	base_executable = getattr(sys, "_base_executable", None)
	if is_venv:
	# XXX There is probably a bug related to venv, since
	# sys._base_executable should be different.
	if base_executable == sys.executable:
	# Indicate that we don't know.
	base_executable = None
	elif not base_executable:
	base_executable = sys.executable