ci(Travis): use xenial image

KaiSchwarz-cnic · KaiSchwarz-cnic · commit a521991c6de3 · 2019-04-02T11:02:05.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: java
-dist: trusty
+dist: xenial
 notifications:
   email: false
 sudo: false
