Add node_js 7 (motdotla#239)

abetomo · DeviaVir · commit 9d52920a44dc · 2017-04-24T11:36:33.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,3 +4,4 @@ node_js:
   - 4
   - 5
   - 6
+  - 7

-Original file line number
+Diff line change
   - 4
   - 5
   - 6
 +  - 7