refactor: defer handling of prepareForCompletion violations to submission#545

kieran-osgood-shopify merged 1 commit intomainShopify/checkout-sheet-kit-swift:mainfrom

kieran-osgood/03-27-refactordeferhandlingofprepareforcompletionviolationstosubmissionShopify/checkout-sheet-kit-swift:kieran-osgood/03-27-refactordeferhandlingofprepareforcompletionviolationstosubmissionCopy head branch name to clipboard