message: Added sku, vendor, properties for LineItem and properties for Cart
diff: @@ -8,6 +8,7 @@ export interface Cart {
  cartDiscount?: Discount;
  customer?: Customer;
  lineItems: LineItem[];
  + properties: Record<string, string>;
  }
  export interface Customer {
  @@ -27,6 +28,9 @@ export interface LineItem {
  productId?: number;
  discount?: Discount;
  taxable: boolean;
  + sku?: string;
  + vendor?: string;
  + properties: {[key: string]: string};
  }
  export interface Discount {
  