Add classifier for Python 3.13 support

Author: gpotter2

pyproject.toml

@@ -35,6 +35,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Security",
     "Topic :: System :: Networking",
     "Topic :: System :: Networking :: Monitoring",