Migration from stripe 4.0 to latest stripe 8.x

[parthadrojasa]

I have not updated stripe from a long time and i now it seems that paymentkit is integrated into stripe. So i have used multiple things from paymentkit and i am not able to find proper thing how to migrate the code. I have some queries below.

1. I am using PTKCardNumber like
   let cardNumber:PTKCardNumber = PTKCardNumber(string:strCardNumber)
2. PTKCardTypeAmex like to determine which card is it.
3. PTKTextField for the card like
   PTKTextField.textByRemovingUselessSpacesFromString(str as String)

What is used in place of above this all in new stripe?

[0thernet]

See stripe/stripe-ios#467