Update python version trove classifiers

Author: nocarryr

setup.cfg

@@ -23,6 +23,8 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Intended Audience :: Developers
     Intended Audience :: Information Technology
     Framework :: AsyncIO