Update classifier tags

Signed-off-by: Jono Yang <jyang@nexb.com>

Author: JonoYang

setup.cfg

@@ -12,8 +12,8 @@ url = https://github.com/nexB/typecode
 classifiers =
 	Development Status :: 5 - Production/Stable
 	Intended Audience :: Developers
+	Programming Language :: Python :: 2
 	Programming Language :: Python :: 3
-	Programming Language :: Python :: 3 :: Only
     Topic :: Software Development
     Topic :: Utilities
 keywords =