title: Vue pass slot template to extended component
body: <p>Is any way to pass a template to extended component? Example, that illustrates the problem:</p>
  
  <p>There is a component named <code>Slide</code> with a template like so:</p>
  
  <pre><code>&lt;template&gt;
      &lt;div class="swiper-slide swiper-slide-one"&gt;
          &lt;div class="swiper-filter"&gt;&lt;/div&gt;
          &lt;slot /&gt;
      &lt;/div&gt;
  &lt;/template&gt;
  </code></pre>
  
  <p>In other place i need to create and mount that component in imperative style:</p>
  
  <pre><code>import SlideComponent from '@/components/Slide'
  const Slide = Vue.extend(SlideComponent);
  new Slide().$mount('#container');
  </code></pre>
  
  <p>The problem is that i have no idea how to pass a template that will be compiled in the slot of the extended component.</p>
  
  <p><a href="https://jsfiddle.net/f9d8mn9r/" rel="noreferrer">jsfiddle</a></p>