title: Shopify orders api returns invalid data
body: <p>I'm currently making a request to shopify api like so:
  I've tried hitting these end points:</p>
  
  <pre><code>orders.json?updated_at_min=2019-07-17T19:00:42-07:00&amp;limit=150
  orders.json?created_at_min=2019-07-17T19:00:42-07:00&amp;limit=150
  orders.json?updated_at_min=2019-07-17T19:00:42
  </code></pre>
  
  <p>According to the docs found here:
  <a href="https://help.shopify.com/en/api/reference/orders/order" rel="nofollow noreferrer">https://help.shopify.com/en/api/reference/orders/order</a></p>
  
  <p>this is a valid end point call:</p>
  
  <pre><code>created_at_min
  created_at_max
  updated_at_max
  </code></pre>
  
  <p>The results I get back are:</p>
  
  <pre><code>+"closed_at": null
      +"created_at": "2019-08-07T19:02:37-07:00"
      +"updated_at": "2019-08-07T19:02:52-07:00"
  </code></pre>
  
  <p>The above is just part of the returned data.  What gives? The created_at_min doesn't work neither does updated_at_min</p>
  
  <p>The docs say the string should be: Iso8601String</p>