Add support for Python 3.11 in setup.py

Author: CeeEffEff

setup.py

@@ -19,6 +19,7 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         "License :: OSI Approved :: MIT License",
     ],
-)
+)