The v-form component has
three functions that can be accessed by setting a
ref on the component. A ref allows us to access internal
methods on a component, for example,
<v-form ref="form">.
this.$refs.form.validate() will validate all
inputs and return if they are all valid or not.
this.$refs.form.reset() will clear all inputs and
reset their validation errors.
this.$refs.form.resetValidation() will only reset
input validation and not alter their state.