[V4] Add all needed props

[rvsia]

• [x] initialValues @rvsia https://github.com/data-driven-forms/react-forms/pull/702
• [x] debug @rvsia https://github.com/data-driven-forms/react-forms/issues/690
• [x] subscription https://github.com/data-driven-forms/react-forms/issues/693
• [ ] mutators (?)
  • do we need them? we can actually implement field array right into the library
• [x] validate @Hyperkid123 https://github.com/data-driven-forms/react-forms/issues/687
• [ ] validateOnBlur (?)
• [x] keepDirtyOnReinitialize @rvsia https://github.com/data-driven-forms/react-forms/pull/720
• [ ] decorators (?)
• [ ] form (?)

:no_entry: component - no need for it, we are not exposing it to users

• [ ] initialValuesEqual (?)

[Hyperkid123]

@rvsia I would add field array support directly. There is one decorator that handles focus on the first error field though. We may have to implement that as well.

[Hyperkid123]

component - no need for it, we are not exposing it to users

We will eventually expose this, but we only have to keep the currently exposed API. I think we will stick with the children way of creating the UI.