Merge pull request ageitgey#1370 from anukaal/master

Update setup.py

Author: ageitgey

setup.py

@@ -57,6 +57,7 @@
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     test_suite='tests',
     tests_require=test_requirements