ワードプレスでCSSのキャッシュ対策

function my_theme_scripts()
{
  wp_enqueue_style('reset', get_theme_file_uri('/asset/css/reset.css'));
  wp_enqueue_style('style', get_theme_file_uri('/asset/css/style.css') , array(), date("Ymd-Hi", filemtime(get_theme_file_path('/asset/css/style.css'))));
}
add_action('wp_enqueue_scripts', 'my_theme_scripts');