preventScroll not working in v1

Good day,

In versions 0.x I had to set the prop below to stop the page from scrolling to the top whenever the lightbox was opened. This prop has a default value of true.

```
preventScroll={false}
```

Unfortunately, this trick no longer works in v1 so even with this prop set I'm still experiencing the automatic scroll to the top of the page.

Is anyone else experiencing this?

Here is my JSX:

```

{this.state.lightboxIsOpen && (



)}

```

Cheers,

Alec