Fullscreen button not appearing

Hi, I don't know what is wrong but there is no button.
I've included fullscreen library (both css and js).
I tried to switch the position between flickity core and flickity fullscreen but nothing.

BTW: why in the main documentation page, the container is called "main-caoursel" while with fullscreen is called just "carousel". It is confusing...

Thanks.

```

Document




.carousel-cell {
border:1px solid green;
height: 250px;
width: 250px;

}

```

Start by reproducing the supplied HTML example with flickity@2, flickity-fullscreen@2, fullscreen.js, and fullscreen.css. Inspect the fullscreen button behavior and the documentation examples; done means the fullscreen button appears for the reported setup and the container naming is consistent or clearly explained.

Written by the indexing model from the issue text.