try travis on xenial

mikedh · mikedh · commit ac00399c3549 · 2018-09-11T17:20:50.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: python
 sudo: required
-dist: trusty
+dist: xenial
 
 python:
 - '2.7'
