Enumerate supported pythons

Author: npilon

setup.py

@@ -25,6 +25,10 @@
           "Intended Audience :: Developers",
           'Topic :: Software Development :: Testing',
           "Programming Language :: Python",
+          'Programming Language :: Python :: 2.7',
+          'Programming Language :: Python :: 3.5',
+          'Programming Language :: Python :: 3.6',
+          'Programming Language :: Python :: 3.7',
       ],
       author='Nick Pilon',
       author_email='npilon@gmail.com',