title: How to use vuelidate with vuetify 2 for nested data? Getting invalid field
body: <p>I'm trying to use vuelidate with Vuetify 2 but im getting into trouble when trying to validate a nested object value.</p>
  
  <p>This code works fine:</p>
  
  <pre><code>    &lt;template&gt;
          &lt;v-text-field
          v-model="no_nome"
          :error-messages="nameErrors"
          label="Nome"
          @input="$v.no_nome.$touch()"
          @blur="$v.no_nome.$touch()"
          &gt;
          &lt;/v-text-field&gt;
      &lt;/template&gt;
  
      &lt;script&gt;
  
       import { required } from 'vuelidate/lib/validators'
       export default {
  
          data() {
              return {
                  no_nome:'',
              }
          },
          validations: {
              no_nome: {
                  required
              },
          },
          computed: {
              nameErrors () {
                  const errors = []
                  if (!this.$v.no_nome.$dirty)
                      return errors
                  !this.$v.no_nome.required &amp;&amp; errors.push('Name is required.')
                  return errors
              },
          }
       }
     &lt;/scrip&gt;
  </code></pre>
  
  <p>But if i change my <code>no_nome</code> data to:</p>
  
  <pre><code>        data() {
              return {
                  user : {
                     no_nome:'',
                  }
              }
          },
  </code></pre>
  
  <p>and</p>
  
  <pre><code>        &lt;v-text-field
          v-model="user.no_nome"
          :error-messages="nameErrors"
          label="Nome"
          @input="$v.no_nome.$touch()"
          @blur="$v.no_nome.$touch()"
          &gt;
          &lt;/v-text-field&gt;
  </code></pre>
  
  <p>after running <code>$vm0.$v.no_nome.$touch()</code>, <code>$vm0.$v.no_nome.$invalid</code> will always return <code>true</code> even when <code>user.no_nome</code> is not empty. How can i make the validation works for <code>user.no_nome</code> and any other nested data value?</p>