Chore: add Node 9 to Travis CI

mysticatea · mysticatea · commit 6ef64ab11bf5 · 2017-11-03T14:50:32.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,6 +6,7 @@ node_js:
   - "4"
   - "6"
   - "8"
+  - "9"
 
 script:
   - npm test

-Original file line number
+Diff line change
   - "4"
   - "6"
   - "8"
 +  - "9"
 script:
   - npm test