title: Cannot read property '$cookies' of undefined
body: <p>I installed <code>vue-cookies</code> package, for my <code>vue</code> project.
  but when I use <code>this.$cookies.set(...)</code>, i got <code> Cannot read property '$cookies' of undefined</code> in console and It's not working.</p>
  <hr />
  <p>main.js</p>
  <pre><code>//cookies
  import VueCookies from &quot;vue-cookies&quot;;
  Vue.use(require(&quot;vue-cookies&quot;));
  Vue.use(VueCookies);
  
  </code></pre>
  <p>Should I add more code?</p>