useIntersectionObserver can only observe one element

[valerio-pescatori]

First of all, thank you for this amazing library, it saved me a lot of time!

I am writing some fairly complex logic for which I need an IntersectionObserver that observes more that one element, possibly hundreds.
Now, I know I could use more IntersectionObserver instances but that would take a toll on the performances.

So I was searching for a way to observe more that one element with useIntersectionObserver but it seems it's not possible.

I think it would be a good feature and it would make this hook a better abstraction over the native API.