title: vue-meta / Inertia: Title is 'undefined' between page rendering
body: <p>I'm using Vue 2.6.12, Laravel and Inertia.</p>
  <p>When using vue-meta to alter the meta title it displays 'undefined' for a split second when loading any page.</p>
  <p>Im using Inertia, so the routing is on Laravels side and uses Inertia to pass the Vue component name and data to the frontend.</p>
  <pre class="lang-js prettyprint-override"><code>//app.js
  new Vue({
      metaInfo: {
          titleTemplate: 'Inertia: %s'
      },
      render: h =&gt; h(App, {
          props: {
              initialPage: JSON.parse(el.dataset.page),
              resolveComponent: name =&gt; require(`./Pages/${name}`).default,
          },
      }),
  }).$mount(el)
  
  //Index.vue
  export default {
      metaInfo: {
          title: 'User list'
      }
  }
  </code></pre>
  <p>It generally works, but it seems to stop working while Inertia requests are being processed / recieved / sent.</p>
  <p>How do I prevent this?</p>