ci: Travis: use Ubuntu Xenial

blueyed · blueyed · commit 4105d2c3812e · 2019-07-18T16:30:18.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: generic
-sudo: false
+dist: xenial
 git:
   depth: 10
 
