How to setup custom validation classes?

[gespinha]

Hey everyone!

In previous VeeValidate versions we had something like this to setup custom styling for form inputs without having to create Vue components for each input type:

import Vue from 'vue';
import VeeValidate from 'vee-validate';

Vue.use(VeeValidate, {
  classes: true,
  classNames: {
    valid: 'is-valid',
    invalid: 'is-invalid'
  }
});

Is something like this possible in VeeValidate 4? The only thing I found in the docs is this, which only works if I set Vue components for each input field type.