Modal | Migrating to Javascript default parameters

- `@freenow/wave` version: `2.21.2`

### Relevant code

```js
expect(consoleErrorSpy).not.toHaveBeenCalled()
```

### What was expected to happen?

When running the tests, wave's `Modal` is throwing the following deprecation error messages (check screenshot) that causes the tests to fail.

### Reproduction

Not sure how to reproduce this, this was seen from a `vitest` test environment