v0.0.5 - Add `isCancelled()`

• Implement isCancelled() for responses
• Document Notification setup process

v0.0.4 - Fix ID & reference

• Flip transaction ID & reference to match omnipay common semantics:
  • getTransactionReference(): A reference provided by the gateway to represent this transaction
  • getTransactionId(): Get the transaction ID as generated by the merchant website

v0.0.3 - Transaction ID support

• Add getTransactionId() to get Worldpay's ID from redirect responses

v0.0.2 - Improve Notification support

• Provide isPending() method for ResponseTrait and cover more statuses for responses & notifications
• Support Worldpay origin IPs for notifications, in cases where reverse DNS resolution isn't possible

v0.0.1 - Initial pre-release

• Initial support for standard Hosted journey
• Helpers for handling Notification requests in place with unit tests, but not yet real-world end-to-end tested