Array values for third party checkbox component

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

I think this is bug

### What is the current behavior?

If create adapter component for Field with type="checkbox" and set value attribute. When checking the box will set the value to true, and unchecking the checkbox will set value to false.

### What is the expected behavior?

Checking the box will add the value to the array, and unchecking the checkbox will remove the value from the array.

### Sandbox Link

https://codesandbox.io/s/mmjkqqwy0y

### What's your environment?

react-final-form 3.4.0
react 16.3.2

### Other information