Update the package classifiers.

Author: clokep

setup.py

@@ -27,14 +27,13 @@ def long_description():
         'Topic :: Internet',
         'Framework :: Django',
         'Framework :: Django :: 1.11',
-        'Framework :: Django :: 2.0',
-        'Framework :: Django :: 2.1',
         'Framework :: Django :: 2.2',
+        'Framework :: Django :: 3.0',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Framework :: Django',
         'License :: OSI Approved :: ISC License (ISCL)',
     ],