WP Plugin - stop removing trailing slash

bill-wizard-trailing-slash.php

<?php
/**
 * The Bill Wizard Trailing Slash Fix
 *
 * @package     bill-wizard-trailing-slash
 * @author      wpengine
 * @license     Proprietary
 *
 * @wordpress-plugin
 * Plugin Name: The Bill Wizard Trailing Slash Fix
 * Description: Stops WordPress from redirecting URLs away from having a trailing slash
 * Version:     1.0
 * Author:      wpengine
 * Author URI:  https://wpengine.com
 * License:     Proprietary
 */

namespace BillWizardTrailingSlash;

add_action(
	'template_redirect',
	function() {
		remove_action( 'template_redirect', 'redirect_canonical', 10 );
	},
	1
);