This enables usage of pagination for orders and products

[LarsBuur]

No original work here. It´s basically what @YourWishes suggests in #288.
Could and should be extended throughout the api for lists.

Usage example:

  const orderList: IOrder[] = [];
  const orderStatus = 'any';

  let params = { status: orderStatus, limit: 250 };

  do {
    const orders = await shopify.order.list(params);

    for (const order of orders) {
      orderList.push(order);
    }

    params = orders.nextPageParameters;
  } while (params !== undefined);

  console.log(`after while loop len:${orderList.length}`)

[coveralls]

Coverage remained the same at 100.0% when pulling bf13260 on LarsBuur:master into a0cdad6 on MONEI:master.

[dankeller101]

Just wanted to drop in to say this would be very helpful for us on our project that depends on this wrapper! Let me know if there's any way I can help make this land sooner.

[davidmm07]

@lpinca Check this PR

[lpinca]

It should be done for all supported endpoints.