Updated build commands

Author: shibulijack

package.json

@@ -23,8 +23,8 @@
   "scripts": {
     "precommit": "lint-staged",
     "lint": "eslint .",
-    "build": "babel src/ -d lib/",
-    "buildw": "babel -w src/ -d lib/",
+    "build": "babel src/ -d lib/ --copy-files",
+    "buildw": "babel -w src/ -d lib/ --copy-files",
     "test": "npm run build && node ./node_modules/mocha/bin/mocha --recursive",
     "test-live": "npm run build && node ./node_modules/mocha/bin/mocha --require test_live/_supports/ci-safe --recursive test_live",
     "prepublish": "npm run build"