message: Missing an "async" declaration
  One of the examples has an "await" operator inside a function missing the "async" declaration.
diff: @@ -101,7 +101,7 @@ Validating before submit is very easy way, using the [public methods](#methods)
  <script>
  export default {
  methods: {
  - submit () {
  + async submit () {
  const isValid = await this.$refs.observer.validate();
  if (!isValid) {
  // ABORT!!
  