Fixed scrollpastend issue with resize modifier
Fixed scrollpastend issue with resize modifier

There was an issue with the `--scrollpastend` modifier when a html-area
could be resized (using the `--resize` modifier) where the injected
::after style would not be updated. This has now been fixed by listening
for `mousemove` events on the html-area DOM element (since `resize` only
works on body/window).

ericcornelissen/html-area,ericcornelissen/htmlarea,ericcornelissen/htmlarea