setup.py: add classifiers in for dj30, py38 (#789)

Author: Mogost

setup.py

@@ -54,6 +54,7 @@ def read(fname):
                  'Framework :: Django :: 2.0',
                  'Framework :: Django :: 2.1',
                  'Framework :: Django :: 2.2',
+                 'Framework :: Django :: 3.0',
                  'Intended Audience :: Developers',
                  'License :: OSI Approved :: BSD License',
                  'Operating System :: OS Independent',
@@ -63,6 +64,7 @@ def read(fname):
                  'Programming Language :: Python :: 3.5',
                  'Programming Language :: Python :: 3.6',
                  'Programming Language :: Python :: 3.7',
+                 'Programming Language :: Python :: 3.8',
                  'Programming Language :: Python :: Implementation :: CPython',
                  'Programming Language :: Python :: Implementation :: PyPy',
                  'Topic :: Software Development :: Testing',