add openjdk11 to CI matrix

SethTisue · SethTisue · commit 11f31bbf2b27 · 2019-02-14T14:06:18.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -12,6 +12,7 @@ script:
   - admin/build.sh
 jdk:
   - oraclejdk8
+  - openjdk11
 notifications:
   email:
     - jason.zaugg@lightbend.com
