MYRIAD-312 Fix JDK on Travis build (#141)

diff --git a/.travis.yml b/.travis.yml
index 267aa3d..b92c761 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: java
 
 jdk:
-  - oraclejdk8 
+  - openjdk11
 
 script:
   - TERM=dumb ./gradlew build