Added Python 3.11 classifier

Author: pfmoore

setup.py

@@ -41,6 +41,7 @@ def get_version(rel_path: str) -> str:
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],