Update classification in setup.py

setup.py

@@ -9,6 +9,9 @@ CLASSIFIERS = [
     'Operating System :: POSIX',
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
+    'Programming Language :: Python :: 3.4',
+    'Programming Language :: Python :: 3.5',
+    'Programming Language :: Python :: 3.6',
     'Topic :: Desktop Environment :: File Managers',
 ]