Add Ian to list of walker authors

Author: pattonwebz

class-wp-bootstrap-navwalker.php

@@ -8,7 +8,7 @@
  * Plugin Name: WP Bootstrap Navwalker
  * Plugin URI:  https://github.com/wp-bootstrap/wp-bootstrap-navwalker
  * Description: A custom WordPress nav walker class to implement the Bootstrap 4 navigation style in a custom theme using the WordPress built in menu manager.
- * Author: Edward McIntyre - @twittem, WP Bootstrap, William Patton - @pattonwebz
+ * Author: Edward McIntyre - @twittem, WP Bootstrap, William Patton - @pattonwebz, IanDelMar - @IanDelMar
  * Version: 4.3.0
  * Author URI: https://github.com/wp-bootstrap
  * GitHub Plugin URI: https://github.com/wp-bootstrap/wp-bootstrap-navwalker