Fix node binary warning by not using npm run

Author: gnidan

package.json

@@ -7,7 +7,7 @@
     "esdoc-plugin.js"
   ],
   "scripts": {
-    "prepare": "npm run build",
+    "prepare": "yarn build",
     "build": "webpack --config webpack/webpack.config.js",
     "start": "node ./webpack/dev-server.js",
     "test": "mocha-webpack --webpack-config webpack/webpack.config-test.js --recursive",