Merge pull request #111 from asfaltboy/patch-1

Add python 3.9 to version classifiers

Author: h2non

setup.py

@@ -32,6 +32,7 @@
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Topic :: System',
         'Topic :: System :: Filesystems',
         'Topic :: Utilities'],