update travis settings

nkzawa · nkzawa · commit d29b4fb4f74f · 2017-07-13T15:48:05.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,6 @@
 language: java
+dist: trusty
+sudo: false
 install: mvn install -DskipTests=true -Dgpg.skip=true
 jdk:
   - openjdk7
