title: Add previous button to vue-form-wizard tab content
body: <p>I'm working on a vue form wizard (<a href="https://github.com/BinarCode/vue-form-wizard" rel="nofollow noreferrer">https://github.com/BinarCode/vue-form-wizard</a>)</p>
  <p>Rather then having a previous button in the footer I need to add a button in the second tab-content content.</p>
  <p>I tried something like this but it doesn't work:</p>
  <pre><code>&lt;tab-content title=&quot;second tab&quot;&gt;
      &lt;button @click=&quot;previousTab&quot;&gt;Take me back to the previous tab&lt;/button&gt;
  &lt;/tab-content&gt;
  
  </code></pre>
  <p>How do I add a previous button to my second steps content in StepForm.vue?</p>