Enable openjdk 11 for travi ci (#552)

tokuhirom · web-flow · commit e7fe366b10b5 · 2020-07-21T14:35:26.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: java
 sudo: false
 jdk:
   - openjdk8
+  - openjdk11
 script:
   - ./gradlew check
   - ./gradlew codeCoverageReport
