Add `Python 3 :: Only` classifier
@@ -41,6 +41,7 @@ setup(
"Topic :: Software Development :: Build Tools",
"Programming Language :: Python",
"Programming Language :: Python :: 3",
+ "Programming Language :: Python :: 3 :: Only"
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
