test against node versions 4+

claygregory · claygregory · commit 1fadd156e6a9 · 2017-03-06T11:53:54.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,9 @@
 language: node_js
 node_js:
 - "stable"
+- "6"
+- "5"
+- "4"
 
 after_success:
 - npm run coveralls
