Applies to: Cart Updated
The update_type represents the type of action a user takes to update the cart.
The enum values include:
quantity_added: When a user updates their cart by increasing the quantity of an item within their cart
quantity_removed: When a user updates their cart by decreasing the quantity of an item within their cart
product_added: When a user updates their cart by adding a new product to their cart
product_removed: When a user updates their cart by removing an item from their cart
variant_updated: When a user updates their cart by updating the variant of an item within their cart