add python 3.8 testing (#32)

Author: cscorley

.travis.yml

@@ -1,30 +1,33 @@
-dist: xenial
-sudo: false
-language: python
-matrix:
-  include:
-    - python: 3.4
-      env: TOX_ENV=py34
-
-    - python: 3.5
-      env: TOX_ENV=py35
-
-    - python: 3.6
-      env: TOX_ENV=py36
-
-    - python: 3.7
-      env: TOX_ENV=py37
-    - python: 3.7
-      env: TOX_ENV=lint
-
-    - python: 2.7
-      env: TOX_ENV=py27
-    - python: 2.7
-      env: TOX_ENV=lint
-addons:
-  apt:
-    packages:
-      - ed
-install: pip install tox
-script: tox -e $TOX_ENV
-cache: pip
+dist: xenial
+sudo: false
+language: python
+matrix:
+  include:
+    - python: 3.4
+      env: TOX_ENV=py34
+
+    - python: 3.5
+      env: TOX_ENV=py35
+
+    - python: 3.6
+      env: TOX_ENV=py36
+
+    - python: 3.7
+      env: TOX_ENV=py37
+
+    - python: 3.8
+      env: TOX_ENV=py38
+    - python: 3.8
+      env: TOX_ENV=lint
+
+    - python: 2.7
+      env: TOX_ENV=py27
+    - python: 2.7
+      env: TOX_ENV=lint
+addons:
+  apt:
+    packages:
+      - ed
+install: pip install tox
+script: tox -e $TOX_ENV
+cache: pip

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35,36,37}, lint
+envlist = py{27,34,35,36,37,38}, lint
 
 [testenv]
 commands = nosetests --with-doctest --doctest-extension=rst {posargs}