* Add CartEventsContext with onProceedToCheckout event
* Wrap Cart in CartEventsProvider
* Dispatch onProceedToCheckout event when button is pressed
* Update type of children on CartEventsProvider
* Add test for ProceedToCheckout block
* Add tests for CartEventProvider
* Remove superfluous div
* Fix incorrect nesting after rebase
* Wrap mini cart in CartEventsProvider
* Dispatch onProceedToCheckout event when clicking button in mini cart
* Add tests for mini cart onProceedToCheckout emitter
* Make observer fail so navigation isn't attempted
* Prevent console error on navigation
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests
* Try preventing navigation in unit tests