Add trove classifiers to setup.py

Author: Andrew-Chen-Wang

setup.py

@@ -35,6 +35,12 @@
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Framework :: Django :: 1.11',
+        'Framework :: Django :: 2.0',
+        'Framework :: Django :: 2.2',
+        'Framework :: Django :: 3.0',
+        'Framework :: Django :: 3.1',
+        'Framework :: Django :: 3.2',
     ],
     keywords=['pylint', 'django', 'plugin'],
     zip_safe=False,