use xenial on ci

diff --git a/.travis.yml b/.travis.yml
index 00731821393ec4eb3b713507e761ce40592cee1b..dab13ac6019763260694337191051c4502024ac7 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 ---
 sudo: required
-dist: trusty
+dist: xenial
 language: ruby
 before_install:
   - gem update --system