add [openjdk11] to Travis build (#115)

sullis · thinkingserious · commit 14c506ef1351 · 2019-06-28T15:11:38.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: java
 jdk:
 - oraclejdk8
 - openjdk8
+- openjdk11
 before_script:
 - chmod a+x gradlew
 script:
