[BUG] Cannot reset array of values using form.change function

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

For me it's a bug.

### What is the current behavior?

I have nested fields that set different values of array. One of the fields
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On top of the entire form I have a switcher where user can pick a different scenario. Picking different scenario resets array to the empty array.
I do it by using ``` change(`${prefix}.values`, [])``` but it doesn't work because `change` internally checks if there is any field that has the same "name" as the first argument of function and all of my fields have names like `${prefix}.values.[counter]`

### What is the expected behavior?

It supposed to be possible to change your array value using `form.change`

### Sandbox Link

### What's your environment?
"react-final-form": "3.5.0",
"final-form": "4.7.3",

### Other information
N/A

Start by reproducing the nested Field names such as `${prefix}.values.[counter]` and the `form.change(`${prefix}.values`, [])` call described in the issue. Read the behavior around `form.change` and field-name matching; done means changing the parent name resets the array value to an empty array.

Written by the indexing model from the issue text.