WordPress : Agregar class to link in wp_nav_menu

wp_nav_menu([
    'theme_location'=> 'primary_navigation',
    'menu_class'    => 'navbar-nav ml-auto flex-nowrap',
    'list_item_class'  => 'nav-item',
    'link_class'   => 'nav-link m-2 menu-item nav-active'
]);

Referencia

How to add class to link in wp_nav_menu?