[fix] - Copy JSON files to lib on build as well.

Author: beefancohen

package.json

@@ -17,7 +17,7 @@
   },
   "main": "lib/index.js",
   "scripts": {
-    "build": "rimraf lib && babel src --out-dir lib",
+    "build": "rimraf lib && babel src --out-dir lib && cp -R src/util/attributes lib/util/attributes",
     "prepublish": "npm run lint && npm run test && npm run build",
     "coveralls": "cat ./reports/coverage/lcov.info | coveralls",
     "lint": "eslint  --config .eslintrc.js .",