Note: AUTO add file version based on PHP file modification time to CSS/JS files that were enqueued using wp_enqueue_style and wp_enqueue_script, admin_enqueue_style and admin_enqueue_script.
Note: MANUALLY add file version to CSS/JS files that were enqueued using wp_enqueue_style and wp_enqueue_script, admin_enqueue_style and admin_enqueue_script.
Note: You can put something like 0.0.1 and increment it to become different from the previous input.