* initial mapping out of stripe payment intents
* rename checkout processing statuses to be clearer
* Add new status and refactor checkout complete behaviour.
* Make sure payment result data is included in checkout processing response
* add payment intent handling
Still testing
* make sure promise is returned
* include site url with endpoint
* modify setComplete status to optionally receive redirectUrl for changing in state at the same time as setting status
* fix typo in property retrieval
* add error handling for after checkout processing event
* add notices area for payment methods
* implement error handling for stripe intents
* hook into stripe error processing and include error in payment response
* clear notices so they don’t show in block and merge payment details
* add notice handling to payment context
* modify error processing in checkout processor
* handle errors with fallback in checkout state context
* hook into after processing for stripe cc error handling
* set checkout to idle status if before processing emitters result in error
* Add emit response type-defs and normalize expectations for observer responses
* improve doc block
* switch checkoutIsComplete check to checkoutAfterProcessing for payment complete status change
* remove unneeded event emitters and consolidate some logic
* fix idle status set logic
* Make validation errors appear
* Make validation errors appear all at once
* Simplify diff
* Expose shippingErrorStatus from shipping context
* Memoize currentErrorStatus
* Pass currentErrorStatus to observers
* Add missing type-def property
* Fix typo in constant name
* Refactor emitEvent so false responses don't return true
* Make onCheckoutProcessing observers return errorMessage and validationErrors properties
* Allow for priority to be set on event emitters
* Add payment event emitters
* add new actions/status to checkout state context
* implement event emitters in payment data context
* refactor checkout state context to use new actions in event emitters
* refactor checkout processor to handle new event emitters
* fix type-defs for registered payment methods
* register observer for cheque payment method integration
* add inline todo
* fix sort
* fix tests and add test for priority usage in event emitters
* remove todo and just add explanatory comment
* condense sort logic
* lowercase test description
* abstract emitter callback to reduce code
* don’t process passed in errors if it’s undefined
* improve error response expectation for payment processing event observer