title: unable to update order Fulfillments Shopify-api-node
body: <p>I'm trying to update an orders fulfillments[] but I'm getting</p>
  <pre><code>HTTPError: Response code 400 (Bad Request)
  </code></pre>
  <p>Every thing else is getting updated but not fulfillments[]</p>
  <p>I'm using <strong>shopify-api-node</strong> package</p>
  <p>Here's How I'm trying to update my Orders fulfillment</p>
  <pre><code>const fulfillments = [
      {
    &quot;created_at&quot;: &quot;2012-03-13T16:09:54-04:00&quot;,
    &quot;id&quot;: 255858046,
    &quot;order_id&quot;: orderId,
    &quot;status&quot;: &quot;failure&quot;,
    &quot;tracking_company&quot;: &quot;USPS&quot;,
    &quot;tracking_number&quot;: &quot;1Z2345&quot;,
    &quot;updated_at&quot;: &quot;2012-05-01T14:22:25-04:00&quot;
  }];
  
  shopify.order.update(orderId, {
   id : orderId, fulfillments }).catch((err) =&gt; {
   console.log('err =====&gt;' , err)
    });
  </code></pre>