* Only update grid default attributes on WP >= 5.3
* Use @wordpress/compose from external in Reviews sort-select
* Import withInstanceId from external only on legacy builds
* FallbackModule: add extensions to paths if it's missing
* Use path package to extract path extension
* Make all components import from the base withInstanceId HOC
* Add Checkout form validation
* Add back validation when filling the address without having set a country
* Split TextInput and Select so they can be used with or without validation
* Cleanup
* Only display the missing country error if city, state or postcode are entered
* Fix CSS specificity conflict
* Remove unnecessary semicolon
* Rename areThereValidationErrors to hasValidationErrors
Albert Juhé Lluveras