.travis.yml in embulk-parser-jsonpath-0.3.0 vs .travis.yml in embulk-parser-jsonpath-0.3.1

@@ -1,7 +1,6 @@
 language: java
 jdk:
-  - openjdk7
-  - oraclejdk7
   - oraclejdk8
+  - openjdk8
 script:
   - ./gradlew check