title: Cannot resolve module 'babel-runtime/core-js/object/define-properties'
body: <p>I'm trying to create a plugin for Vue application. I got an error when I wrote the following code: </p>
  
  <pre><code>export default function(Vue){
      Vue.auth = Authentication;
  
      Object.defineProperties(Vue.prototype, {
          $auth: {
              get() {return Vue.auth; }
          }
      });
  }
  </code></pre>
  
  <p>and the error is: </p>
  
  <blockquote>
    <p>ERROR in ./src/authentication.js Module not found: Error: Cannot
    resolve module 'babel-runtime/core-js/object/define-properties' in
    D:\Dropbox\www\Vue\src  @ ./src/authentication.js 7:24-81</p>
  </blockquote>
  
  <p>What's the problem here? I couldn't solve it. Any idea?</p>