Update to specify Python 3.6.4
diff --git a/setup.py b/setup.py
index da4bf09..21e9470 100644
--- a/setup.py
+++ b/setup.py
@@ -60,8 +60,7 @@
           'Programming Language :: Python :: 2',
           '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 :: Software Development :: Libraries :: Python Modules',
           'Topic :: Software Development :: Quality Assurance',
       ],