How can I add an `id` or `class` to an input?

I'd like to be able to define that a form element have its own `id` or `class` in the schema so it can be styled by CSS upon rendering. Is this functionality already included?

This would be similar to how https://github.com/vue-json-schema/form-schema has an `attrs` object for each input that lets HTML attributes be added, like name, id, class, max, min, etc.