Missing public type FieldArrayRenderProps for importing.

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

Feature request

### What is the current behavior?

Missing public type `FieldArrayRenderProps`, instead of that now I need to import from private place which can be changed in any version

```javascript
import type { FieldArrayRenderProps } from 'react-final-form-arrays/dist/types'; // <-- this
...
type FinalFormArrayFieldType = $PropertyType
```

### What is the expected behavior?

```javascript
import type { FieldArrayRenderProps } from 'react-final-form-arrays'; // <-- expect this
...
type FinalFormArrayFieldType = $PropertyType
```