Support multi Direction in swipe to dismiss

[ameer-taghavi]

Please add multi direction in to dismiss
for example
swipToDismissDirections={['up', 'down', 'left', 'right']}

** down direction is useful for bottom toast

[gunnartorfis]

I'll create a separate issue for dismissing by default down for bottom toasts.

[gunnartorfis]

Closing this issue as I don't think this is a good UX. #93 will address the most important thing here which is bottom swiping for bottom toasts.