Cover Python 3.7 and 3.8

setup.py

@@ -30,6 +30,8 @@ setup(
 		'Programming Language :: Python :: 2.7',
 		'Programming Language :: Python :: 3',
 		'Programming Language :: Python :: 3.6',
+		'Programming Language :: Python :: 3.7',
+		'Programming Language :: Python :: 3.8',
 		'Topic :: Communications',
 		'Topic :: Communications :: File Sharing',
 		'Topic :: Internet',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py36
+envlist = py27,py36,py37,py38
 
 [testenv]
 deps =