add support for Python 3.11

Author: prohde

setup.py

@@ -37,6 +37,7 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Operating System :: OS Independent',
         'Intended Audience :: Science/Research'