text: export const ADD_TO_CART = 'ADD_TO_CART';
  export const REMOVE_ITEM = 'REMOVE_ITEM';
  export const SUB_QUANTITY = 'SUB_QUANTITY';
  export const ADD_QUANTITY = 'ADD_QUANTITY';
  export const ADD_SHIPPING = 'ADD_SHIPPING';
  export const CHANGE_QUANTITY = 'CHANGE_QUANTITY';