0.1.2

Updated Android billing library
Updated packages
Stronger typing on events
No longer exporting EventPayload (likely never used, was only necessary at the time for TS)
Deprecated EventContext, EventResult, and IPaymentEvent. Aliased for backwards compatibility:
- EventContext -> PaymentEvent.Context
- EventResult -> PaymentEvent.Result
- IPaymentEvent -> PaymentEvent.Type
All failure events now return a Failure object, but some with a null code (for iOS failures that may occur in try/catches, but these likely never occur anyway).

0.1.1