title: Get the order total shipping in Woocommerce 3
body: <p>I'm trying to get the shipping method or cost of shipping for a WooCommerce order - I'm writing a custom email template that is different depending on free delivery vs paid delivery.</p>
  
  <p>I found a function called <code>get_total_shipping()</code>, but this is now deprecated and I cannot find a replacement - does one exist?</p>
  
  <p>I've noticed that the shipping amount is stored in a hidden meta field (<code>_order_shipping</code>), which I can access, but I worry that this might break on future WooCommerce updates.</p>