Tap outside feature added and project is now in Swift 4

[varkrishna]

I have done two things 1: project is now in swift 4.0 2: Created TapOutside Feature so we have to provide that whether we want to dismiss alert on tapping outside or not on every call For example: SweetAlert().showAlert("Here's a message!", EnabledOutsideTap: false) or SweetAlert().showAlert("Here's a message!", EnabledOutsideTap:true)