Add python 3.11 to setup.py

Author: vincefn

setup.py

@@ -198,6 +198,7 @@ def getversioncfg():
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Scientific/Engineering :: Chemistry',
         'Topic :: Scientific/Engineering :: Physics',
         'Topic :: Software Development :: Libraries',