node engine now >=6, due to coffeescript v2 requirements

Author: balupton

HISTORY.md

@@ -4,6 +4,7 @@
 - Now uses CoffeeScript v2 for compilation
 - Now compiled with CoffeeScript v2
 - Updated base files
+- Minimum node version is now Node v6, as that is the earliest node version that CoffeeScript v2 supports
 
 ## v2.6.0 2017 April 17
 - Updated dependencies

package.json

@@ -56,7 +56,7 @@
  "url": "https://github.com/docpad/docpad-plugin-coffeescript.git"
  },
  "engines": {
- "node": ">=0.8"
+ "node": ">=6"
  },
  "editions": [
  {