Use Ubuntu Xenial at Travis CI

yahonda · yahonda · commit 5647dbcdbb60 · 2019-07-14T12:43:14.000Z
https://docs.travis-ci.com/user/reference/xenial/
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,6 @@
+dist: xenial
 sudo: required
+cache: bundler
 
 env:
   global:
