CI: Add newer Pythons to the CI config

Author: frenzymadness

.travis.yml

@@ -4,6 +4,9 @@ python:
 - '3.5'
 - '3.6'
 - '3.7'
+- '3.8'
+- '3.9'
+- '3.10-dev'
 dist: xenial
 sudo: required
 addons:

setup.py

@@ -126,6 +126,9 @@ def libraries(self, value):
           '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',
           'Topic :: Software Development :: Libraries',
           'Topic :: System :: Networking',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,py36,py37
+envlist = py27,py35,py36,py37,py38,py39,py310
 [testenv]
 commands=
     python tests/parse_ifconfig.py -v