Conda build-and-test script: Avoid pytest that's too new for Py2

# Using pip instead of conda here avoids ridiculous uninstall chains

# like these:https://gitlab.tiker.net/inducer/pyopencl/-/jobs/61543

PYTHON_VER=$($PY_EXE -c 'import sys; print(".".join(str(s) for s in sys.version_info[:2]))')

if [[ "${PY_EXE}" == 2* ]]; then

  ${PY_EXE} -mpip install "pytest<5"

else

  ${PY_EXE} -mpip install pytest

fi

conda list