build(Travis): Add tests for node v4, v5, v6

nodkz · nodkz · commit 4baf0a74549a · 2017-06-06T11:54:34.000+06:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,6 +8,9 @@ notifications:
   email: true
 node_js:
   - "7"
+  - "6"
+  - "5"
+  - "4"
 script:
   - yarn run coverage
   - yarn run build
