El.contains does not work if element no longer exists in DOM

[aariacarterweir]

By the time the event bubbles, if the event.target is no longer in the DOM, el.contains will return false which incorrectly registers as an 'outside' click. This limits the usefulness of this package, fixes include:

• Add Event.stopPropagation on every single element that is removed from the DOM after the event bubbles.
• Use Event.composedPath() / Event.path to correctly detect event.target location at the time of the event.