Set testing env to use Ubuntu trusty

robincher · robincher · commit dab79fff2744 · 2019-07-25T14:35:26.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,8 @@ language: java
 jdk:
 - oraclejdk8
 
+dist: trusty
+
 env:
 - GRADLE_OPTS="-Dfile.encoding=utf-8"
 
