feat(apple-pay): update for version 3 of the Apple Pay plugin.

[ajcrites]

trueflywood's fork is currently used for this plugin. I'm changing it back to the original which contains the current changes and also includes type definitions and methods for the new version as well as documentation updates.

The diff here is a little weird and some things were not changed although they are showing up in the diff. A summary of changes:

• Updated repo to match the one used for cordova-plugin-applepay which is the most up-to-date
• Added a couple more types for transaction completion and new methods
• Organized IPaymentResponse type and updated to match plugin response
• Added IOrderItemsAndShippingMethods type used by the new update method. IOrder can extend from this type, and now billing/shipping requirements can be an array
• Added selected shipping contact response for new methods
• Added methods to start and stop listening to shipping contact selections and update items/shipping methods in response to these selections
• Updated completeLastTransaction to return a promise to be consistent with the cordova plugin
• Updated examples