fixed setup.py

Author: flying-sheep

setup.py

@@ -39,7 +39,7 @@
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7'
+        'Programming Language :: Python :: 3.7',
         'Topic :: Scientific/Engineering :: Bio-Informatics',
         'Topic :: Scientific/Engineering :: Visualization',
     ],