Advertize and test Python 3.11 support

Change-Id: Ic1d5aaaf8043e4c1c732b37410a88e5b22e54b44
diff --git a/setup.py b/setup.py
index 23a9c21..1a29442 100644
--- a/setup.py
+++ b/setup.py
@@ -20,6 +20,7 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Intended Audience :: Developers',