only fire onTap once for touchend when tracking mouse and touch

[hartzis]

Fix for #231.

Only fire onTap once for touchend event when both trackMouse and trackTouch are true.

[hartzis]

When i went to sleep last night i realized this initial solution would break mouseup when the user "just clicks" with a mouse.

I took another look at all the amazing examples over at patrickhlauke/touch and stumbled upon his solution for this very issue:

• https://github.com/patrickhlauke/touch/blob/gh-pages/tests/event-listener_naive-event-doubling-fixed.html

It looks like we can call event.preventDefault() on the touchend when both trackTouch and trackMouse are true.

Example - https://codesandbox.io/s/ecstatic-hawking-556qn

Updating this PR now, but i dont think there is any real way to test this with @testing-library/react, but i can get an alpha version published and we can use the codesandbox from #231 to test.

[hartzis]

Closing in favor of users implementing fix via this solution - #231 (comment)