Update package.json

Author: mountainboooy

package.json

@@ -25,7 +25,7 @@
     "test:watch": "react-scripts test --env=jsdom",
     "build": "rollup -c",
     "start": "rollup -c -w",
-    "prepare": "yarn run build",
+    "prepare": "rollup -c",
     "predeploy": "cd example && yarn install && yarn run build",
     "deploy": "gh-pages -d example/build"
   },