Maximum call stack size exceeded when initialValue is an array/object

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

### What is the current behavior?
Since version `1.0.1` it seems, that values initialized with an empty array leads to a `Maximum call stack size exceeded` error.

### What is the expected behavior?
That I can operate on this array like in version `1.0.0-alpha.1`.

### Sandbox Link
https://codesandbox.io/s/react-final-form-hooks-simple-example-82tcn?fontsize=14&hidenavigation=1&theme=dark&file=/src/index.js

You can switch between the versions, which should result in the described behaviour. Could it be, that this use case handling arrays and objects should be handled differently now?