chore(travis): update ubuntu & move to openjdk

Xerus · Xerus · commit 54d610b1a23d · 2020-03-10T00:03:39.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,6 @@
-dist: trusty
-sudo: false
-jdk:
-  - oraclejdk8
+dist: bionic
+language: java
+jdk: openjdk8
 git:
   depth: 3
 
