Chore: add Node.js 8 into Travis CI

mysticatea · mysticatea · commit f278ac507c05 · 2017-06-18T18:05:51.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,7 @@ language: node_js
 node_js:
   - "4"
   - "6"
-  - "7"
+  - "8"
 before_script:
   - npm run setup
 after_success:
