Require at least Node 6

Author: voxpelli

.travis.yml

@@ -1,10 +1,5 @@
 language: node_js
 node_js:
-  - '0.10'
-  - '0.12'
-  - 'iojs'
-  - '4'
-  - '5'
   - '6'
   - '7'
   - '8'

package.json

@@ -9,6 +9,9 @@
   "scripts": {
     "test": "standard && node cli.js test/ && node cli.js . && node cli.js . --missing --extra --no-dev -e js:detective-cjs"
   },
+  "engines": {
+    "node": ">=6.0.0"
+  },
   "author": "max ogden",
   "dependencies": {
     "async": "^2.1.4",

readme.md

@@ -7,6 +7,10 @@ checks which modules you have used in your code and then makes sure they are lis
 
 [![js-standard-style](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
 
+## requirements
+
+dependency-check `3.x` supports Node.js 6 and later
+
 ## how it works
 
 `dependency-check` parses your module code starting from the default entry files (e.g. `index.js` or `main` and any `bin` commands defined in package.json) and traverses through all relatively required JS files, ultimately producing a list of non-relative modules