Merge pull request #3587 from ales-erjavec/fixes/python-louvain-requirements

[FIX] setup.py: Specify python-louvain version constraint

Author: janezd

requirements-core.txt

@@ -16,6 +16,6 @@ keyrings.alt    # for alternative keyring implementations
 setuptools>=36.3
 serverfiles		# for Data Sets synchronization
 networkx
-python-louvain
+python-louvain>=0.13
 requests
 openTSNE>=0.3.0