Fixing PyPI classifiers

Author: Jason Costello

setup.py

@@ -24,7 +24,7 @@
     },
     classifiers=[
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6"
+        "Programming Language :: Python :: 3.6",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",