WooCommerce Subscriptions: Also send Subscription Cancelled email to customer

functions.php

<?php

add_action('woocommerce_subscription_status_pending-cancel', 'yanco_woocommerce_subscription_status_pending_cancel', 10, 3 );
function yanco_woocommerce_subscription_status_pending_cancel( $subscription ) {
    $customer_email = $subscription->get_billing_email();
    $wc_emails = WC()->mailer()->get_emails();

    $admin_email = $wc_emails['WCS_Email_Cancelled_Subscription']->recipient;
    $wc_emails['WCS_Email_Cancelled_Subscription']->trigger( $subscription );

    $wc_emails['WCS_Email_Cancelled_Subscription']->recipient = $customer_email;
    $wc_emails['WCS_Email_Cancelled_Subscription']->trigger( $subscription );
}