Upgrade to Ubuntu 16.04 LTS (Xenial) distribution on Travis CI

saudet · saudet · commit d267c5fe064e · 2019-06-27T20:08:20.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,8 @@
-dist: trusty
+dist: xenial
 sudo: false
 language: java
 jdk:
-  - oraclejdk8
+  - openjdk11
 cache:
   directories:
     - $HOME/.m2
