Switch Travis build to Xenial

nikic · nikic · commit 0abea96de976 · 2018-09-17T13:49:08.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,4 @@
-dist: trusty
+dist: xenial
 language: c
 sudo: required
 addons:
