Update Travis image, add Python 3.7 tests. (#59)

mrstegeman · web-flow · commit 2c1ac9c472bc · 2019-08-08T08:29:07.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,11 @@
+dist: xenial
 language: python
 python:
     - "2.7"
     - "3.4"
     - "3.5"
     - "3.6"
+    - "3.7"
 install:
     - pip install -r requirements.txt
 script:
