Update PyPI classifiers since our supported versions changed

Author: aiham

setup.py

@@ -61,9 +61,10 @@ def find_version(*file_paths):
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
 
         'Topic :: Communications',
         'Topic :: Communications :: Chat',