title: Sending email to customer on cancelled order in Woocommerce
body: <p>I am trying to send an email to the client when an order gets cancelled. By default, woocommerce only sends this email only to the admin of the site.
  This code has solved the issue for related posts on the web:</p>
  
  <pre><code>function wc_cancelled_order_add_customer_email( $recipient, $order ){
     return $recipient . ',' . $order-&gt;billing_email;
  }
  add_filter( 'woocommerce_email_recipient_cancelled_order', 'wc_cancelled_order_add_customer_email', 10, 2 );
  add_filter( 'woocommerce_email_recipient_failed_order', 'wc_cancelled_order_add_customer_email', 10, 2 );
  </code></pre>
  
  <p>However, it seems like woocommerce removed those filter hooks completely.
  Is there any way of doing this?</p>
  
  <p>Thanks in advance!</p>