Update trove classifiers

Author: lcnittl

setup.cfg

@@ -16,14 +16,15 @@ classifiers =
 	Development Status :: 3 - Alpha
 	Environment :: Console
 	Environment :: Web Environment
+	Framework :: Sphinx :: Extension
 	Intended Audience :: Developers
 	License :: OSI Approved :: BSD License
 	Operating System :: OS Independent
-	Programming Language :: Python
+	Programming Language :: Python :: 3
 	Programming Language :: Python :: 3.7
 	Programming Language :: Python :: 3.8
 	Programming Language :: Python :: 3.9
-	Topic :: Documentation
+	Topic :: Documentation :: Sphinx
 	Topic :: Utilities
 
 # [egg_info]