Test Node.js 4, 6, and 8 on Travis CI

Hyunje Jun · Hyunje Jun · commit a0074d55232e · 2017-10-24T15:04:00.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
 node_js:
+  - "4"
   - "6"
-  - "7"
   - "8"

-Original file line number
+Diff line change
@@ @@ -1,5 +1,5 @@ @@
 language: node_js
 node_js:
 +  - "4"
   - "6"
 -  - "7"
   - "8"