message: update eventbus example
diff: <div class="columns is-multiline">
  <child-component></child-component>
  <div class="column is-12">
  - <button class="button is-primary" type="button" :disabled="errors.any()">Submit</button>
  <button class="button is-info" type="button" @click="validateChild">Validate Child</button>
  <button class="button is-danger" type="button" @click="clearChild">Clear Child Errors</button>
  </div>
  