Update touch.json

Mozilla stop support of touch events after version 24, and since version 18 has only vendor prefixed support of touch events, see links down.

https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Events/Touch_events_%28Mozilla_experimental%29

https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Events/Touch_events
Merge pull request #375 from sh0dow/patch-1

Update touch.json