title: nuxtjs vuetify v-img placeholder not working
body: <p>under nuxt.js i'm using vuetify. v-img works, but as i try to use the 'placeholder' feature, as described in the docs, it does not work. for the example i copy exactly the example that works in the docs.
  we suppose to see a circle loader while we wait for the image.
  for testing, i'm using chrome to slow down the connection.
  this doesn't work. there is a blank for a few seconds, then the image appears. 
  here is the code. any idea?</p>
  
  <pre><code>&lt;v-col cols="4"&gt;
    &lt;v-img :src="selectedItem.picture"&gt;
      &lt;template v-slot:placeholder&gt;
         &lt;v-row class="fill-height ma-0" align="center" justify="center"&gt;
           &lt;v-progress-circular indeterminate color="blue"&gt;&lt;/v-progress-circular&gt;
         &lt;/v-row&gt;
      &lt;/template&gt;
    &lt;/v-img&gt;
  &lt;/v-col&gt;
  </code></pre>
  
  <p>note: i'm not using vuetify-loader. could this be the issue?</p>