Update supported JDKs in travis

Author: jazzido

.travis.yml

@@ -2,9 +2,12 @@ language: java
 install: mvn install -DskipTests=true -Dmaven.javadoc.skip=true -Dgpg.skip=true -B -V
 script: mvn test -Dgpg.skip=true
 jdk:
-  - openjdk7
   - oraclejdk8
   - oraclejdk9
+  - oraclejdk10
+  - openjdk8
+  - openjdk9
+  - openjdk10
 sudo: false