[options] in <highcharts-angular> is not immutable

When passing options into `` via the `async` pipe, it mutates the options object.

```html

```

`chartOptions$` is an observable which takes chartOptions from `ngrx` store, but whenever I change data in the store, it mutates the **PREVIOUS** value stored in the store.

I fixed this by deep cloning the chartOptions before it gets passed into `highcharts-cangular`:

```ts
JSON.parse(JSON.stringify());
```

But can we have an official fix?

Here is the StackBlitz to re-produce the problem:

https://stackblitz.com/edit/angular-soounx