Merge pull request #41 from alysbrooks/alys/update-python

Add support for Python 3.8-3.10

Author: aparrish

setup.py

@@ -39,6 +39,9 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Intended Audience :: Developers',