Add Java 9 to the Travis' build matrix

plamentotev · plamentotev · commit 323443ae52dd · 2018-02-16T22:21:30.000+02:00
This closes #65
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: java
 jdk:
   - openjdk7
   - oraclejdk8
+  - oraclejdk9
 
 # No need for preliminary install step.
 install: true
