add python version check in setup.py
This avoids building to be executed with python2 that will fail
with non-obvoius error.
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
###############################################################################
+import sys
+if sys.version_info[:2] < (3, 5):
+ raise RuntimeError("Python version >= 3.5 required.")
+
import logging
from setuptools import setup
from setuptools import find_packages
