False positive if the target element is unmounted by click

[gpoole]

In some cases, the hook will call onTriggered unexpectedly if the clicked element removes itself from the DOM via an onClick handler. It seems like by the time useDetectClickOutside's click handler is called, React has already run the target element's onClick, updating and removing the target element from the DOM so it no longer counts as being "inside" the parent.

Here's an example demonstrating the problem:
https://codesandbox.io/s/goofy-shannon-32xh9?file=/src/App.js

[zhaluza]

Thanks for diagnosing this issue @gpoole ! I may have some time to take a look at this next week, but feel free to put up a PR if you're up to it!