Update redux-saga documentation to use redux-saga-final-form

### Are you submitting a **bug report** or a **feature request**?

Feature request

### What is the current behavior?

Currently react-final-form advertises react-redux-promise-listener to be used for redux-saga. This module is universal, but has some issues:

1. No typings
2. Extra tag/callback in component structure
3. No multiple stores support (hard to write unit tests)

### What is the expected behavior?

I wrote redux-saga-final-form module, which works using react hooks, has simpler syntax and is written with typescript. It works, but it is currently only used in our company. I want to ask if it possible to update react-final-form documentation to use this module instead?

I can transfer this package/repository in final-form organization if needed