* Add batch route
* Register batch route
* Allow batching on writable endpoints
* Batch in client
* Batch non-GET requests
* Batching support with typescript defs
* Remove unused hook
* Prevent multiple fragment updates
* Only use batch route if detected
* Correct var name
* Move nonce check to validate_callback so it runs before requests are completed
* remove unused imports
* updateCartFragments function as const
* Add phpunit tests for batching functionality
* Reduce batch delay
* increase timeout
* Update isCartUpdatePostRequest for batch support
* Update Endpoint used in test
* Move nonce check back inline - custom headers are not returned otherwise
* Fix error handling
* Back to 30s
* Update assets/js/middleware/cart-update.ts
Co-authored-by: Thomas Roberts <5656702+opr@users.noreply.github.com>
* whitespace
Co-authored-by: Thomas Roberts <5656702+opr@users.noreply.github.com>
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