Merge pull request #133 from csdenboer/patch-1

update setup.py: only python 3.7 is supported.

Author: angelomelonas

setup.py

@@ -58,8 +58,6 @@
 
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate whether you support Python 2, Python 3 or both.
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
     ],