validation framework adapters

[theluk]

currently validation might be accomplished via middlewares.

<Middleware use={(data, update, fail) => ...} />

My idea is to have some sub packages (like react-formular-{framework}) that can be imported. Some of the famous ones would be yup and could be implemented as

import { schema } from './my-yup-schema'
import Validator from 'react-formular-yup'

<Validator schema={ schema } />