travis: bump to xenial

FauxFaux · FauxFaux · commit f8c52cba964b · 2019-04-13T13:35:26.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -14,5 +14,5 @@ addons:
     - build-essential
     - libapt-pkg-dev
 
-dist: trusty
+dist: xenial
 sudo: false
