Modify setup

setup.py

 # -*- coding: utf-8 -*-
-import os
 from setuptools import setup, find_packages
+import pathlib
 
 _MAJOR = 0
 _MINOR = 1
@@ -59,13 +59,14 @@ setup(
     zip_safe=False,
     packages=find_packages(),
     install_requires=requirements,
+    python_requires='>=3.5',
 
     # This is recursive include of data files
     exclude_package_data={"": ["__pycache__"]},
     # Command line
     entry_points={
         'console_scripts': [
-            'frags=frags.FindRecombinationsAmongGenomes:main'
-        ]
-    }
+            'frags=frags.FindRecombinationsAmongGenomes:main',
+        ],
+    },
 )