React Native application can't press "Next" nor `Go To` buttons

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

- [x] Bug

### What is the current behavior?

It is not possible to press `Next` or `Go To` buttons.


### What is the expected behavior?

I expect to be able to use those in react native environment.

### What's your environment?

- react-native on expo SDK37

### Other information

I believe this is related to #483 , in order to press the next button, we **MUST** be able to target the underlying reference, see https://stackoverflow.com/questions/32748718/react-native-how-to-select-the-next-textinput-after-pressing-the-next-keyboar

### Possible fix

- Apparently there is a fix already submitted: https://github.com/final-form/react-final-form/pull/608#issuecomment-525540956

It just needs some approval and a release. It is stuck for almost a year, and every RN user would benefits from it.