title: Vuetify v-text-field not updating value when it is changed. Even on $forceUpdate()
body: <p>Vuetify v-text-field not updating value when it is changed. Even on $forceUpdate() and when using $set</p>
  
  <p>I have tried to use it without $forceUpdate and $set but even with both of these methods it does not work</p>
  
  <p>Example what <strong>DOES</strong> work <strong>WITHOUT</strong> vuetify:
  <a href="https://jsfiddle.net/gu273qy0/3/" rel="nofollow noreferrer">https://jsfiddle.net/gu273qy0/3/</a></p>
  
  <p>Example of what <strong>DOES NOT</strong> work <strong>WITH</strong> Vuetify:
  <a href="https://jsfiddle.net/gu273qy0/5/" rel="nofollow noreferrer">https://jsfiddle.net/gu273qy0/5/</a></p>
  
  <p>This javascript can be used in both examples</p>
  
  <pre><code>new Vue({
    el: "#app",
    data: () =&gt; ({
      todos: ['']
    }),
    methods: {
      setText(index, todo){
          if (todo.toString().match(/^((([A-Z]{3})[UJZ](\d{0,7}))|[A-Z]{0,3})$/)) {
          this.$set(this.todos, index, todo)
        }
  
        this.$forceUpdate()
      },
      addText() {
          console.log(this.todos)
              this.todos.push('')
      }
    }
  })
  </code></pre>
  
  <p>I expect that the exact same implementation works with vuetify and without vuetify. Unfortunately this is not the case. Only the non vuetify example works.</p>
  
  <p>An example of a <strong>valid</strong> value or todo is <code>AAAU0101201</code>. </p>
  
  <p>An example of a <strong>invalid value</strong> is <code>AAAA</code></p>