Fixeswoocommerce/woocommerce-admin#4464
`wcadmin_tasklist_shipping_label_printing` events were being filtered into rejected events because the data being passed was in camel case instead of snake case. This fixes that issue.
* Add onboarding task status API endpoint.
* Add task status to onboarding data store.
* Update appearance task to use onboarding store for status info.
* Update main task list component to use onboarding data store for status info.
* Clear onboarding status info "cache" when setting shipping rates in the task list.
* Clear onboarding status info "cache" when enabling payment methods from the task list.
* Fix onboarding data store reducer tests.
* Clean up redundant code, nest task status settings under new key for hydration.
* Include tasks status in onboarding data hydration.
* Update tax task to use onboarding data store for status info.
* Avoid continually rehydrating onboarding data.
* Refactor payment task method retrieval to use onboarding data store.
* Fix bug with disappearing appearance tax steps.
* Update appearance completion faster by using hydrated onboarding value.
* Avoid PHP warnings when onboarding isn't enabled.
* Remove unused imports.
* Show success screen based on conditions instead of step
* Use promise chain to handle updating tax settings
* Fix up error handling for failed setting updates
* Skip store location step if complete address exists
* Fix up pending/requesting state logic
* Allow opt in to TOS on tax task
* Don't complete task from completeStep
* Add caption styling to TOS text
* Move TaskList component up in directory tree.
* Render the TaskList on the new home screen.
* Render single tasks in isolation on new home screen.
* Fix "is requesting" selection for options API.
* Add loading placeholder for TaskList.
* Add initial test for the task list on the home screen.
* Fix dynamic imports under test.
* Add test for inline TaskList on home screen.
* Test that single task view works on new home screen.
* Restore Jest mocks between tests.
* Fix linting errors.