Updated to support Defold 1.8.0

CHANGE: This version works on Defold 1.8.0 and above

Updated to support Defold 1.4.0

CHANGE: This version works on Defold 1.4.0 and above

Updated string allocation code

FIX: Updated string allocation function

Updated to support latest version of Emscripten

BREAKING CHANGE: Updated to support latest version of Emscripten. Requires Defold 1.2.178

Fixed crash if document.monetization is undefined

1.0.2

Early exit from event listener if webmonetization is undefined

Fixed crash when listener was unloaded

1.0.1

Improved example. Fixed invalid callback error.

Include event details in listener response

NEW: The event listener now also returns the event details. Example:

webmonetization.set_listener(function(self, event, details)
    pprint(details)
end)

Details table:

{
  paymentPointer = "$ilp.uphold.com/QkG86UgXzKq8",
  assetScale = 9,
  amount = "26009",
  requestId = "a1f728aa-21e0-4376-ae99-0ccb22642956",
  assetCode = "XRP"
}