Update Cart Item

curl --request PUT \
  --url https://api.craveup.com/v1/cart/{cartId}/cart-item \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "productId": "<string>",
  "quantity": 123,
  "options": [
    {
      "modifierGroupId": "<string>",
      "optionId": "<string>"
    }
  ],
  "specialInstructions": "<string>"
}'

{
  "id": "<string>",
  "totalQuantity": 123,
  "subTotal": "<string>",
  "taxTotal": "<string>",
  "orderTotal": "<string>",
  "items": [
    {}
  ]
}