add [openjdk11] to Travis build matrix (rsocket#586)

sullis · robertroeser · commit 05a99a1c96c7 · 2019-02-27T00:35:04.000-08:00
Signed-off-by: Sean Sullivan &lt;github@seansullivan.com&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -18,7 +18,7 @@ language: java
 
 jdk:
 - oraclejdk8
-# - oraclejdk9
+- openjdk11
 
 env:
   global:
