Use jdk 11 on travis.

2019-04-22 15:57:15 +02:00 · 2019-04-22 15:57:15 +02:00 · 26e74fd892
commit 26e74fd892
--- a/.travis.yml
+++ b/.travis.yml
@ -1,4 +1,5 @@
 language: java
+jdk: openjdk11
 before_script: cd gradle

 before_cache: