Added Gitter link to contribution guidelines (#259)
Added Gitter link to contribution guidelines (#259)

* Added Gitter link to contribution guidelines

Can be used as an alternative to StackOverflow questions, or as a way for us to discuss dev changes in a more chat-like way than with issues

* Updated Gitter link

So it actually works

birjolaxew/sweetalert2,johan-weitner/SweetAlert3,limonte/sweetalert2,johan-weitner/SweetAlert3,birjolaxew/sweetalert2,erbelair/sweetalert2,erbelair/sweetalert2