Include status codes on ApplePaySession object

[clintonb]

The real ApplePaySession object includes a number of statuses that can be passed to the completePayment, completeShippingContactSelection , and completeShippingMethodSelection methods. While it is relatively easy to add these manually, it would be ideal if they were included on the mocked object by default.

See https://developer.apple.com/documentation/applepayjs/applepaysession/apple_pay_status_codes for the complete list of status codes.

[glentregoning]

Hi @clintonb,

Thanks for the feedback. This seems like a reasonable proposal. If you'd be up for putting together a PR adding these I'd be up for including it.

[clintonb]

Great. I'll work on it sometime this week.