Add Python 3.11 classifier to setup.py

Author: Jackenmen

setup.py

@@ -41,6 +41,7 @@ def get_version():
           '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',
       ],