En queue scripts the right way

add_action('wp_enqueue_scripts', 'shopkeeper_enqueue_styles', 100);
function shopkeeper_enqueue_styles()
{
    // enqueue parent styles
    //wp_enqueue_style('shopkeeper-parent-styles', get_template_directory_uri() .'/style.css');
    // enqueue RTL styles
    if (is_rtl()) {
        //wp_enqueue_style( 'shopkeeper-child-rtl-styles', get_template_directory_uri() . '/rtl.css', array( 'shopkeeper-styles' ), wp_get_theme()->get('Version') );
    }
    // Do manually to control version. Forces new version to show rather than outdated ver
    //wp_enqueue_style( 'blankslate-style', get_stylesheet_uri() );
    wp_enqueue_script('jquery');
    wp_enqueue_script('jquery-ui-core');
    wp_register_script('ScrollMagic', get_stylesheet_directory_uri() . '/js/scrollmagic.min.js', array('jquery'), '1.1', false);
    wp_enqueue_script('ScrollMagic');
}
/* asynchronously load scripts *************************/
function add_async_attribute($tag, $handle)
{
    // add script handles to the array below
    $scripts_to_async = array('jquery-migrate', 'jquery', 'jquery-ui-core');
    foreach ($scripts_to_async as $async_script) {
        if ($async_script === $handle) {
            return str_replace(' src', ' async src', $tag);
        }
    }
    return $tag;
}
add_filter('script_loader_tag', 'add_async_attribute', 10, 2);
/* defer scripts *************************/
function add_defer_attribute($tag, $handle)
{
    // add script handles to the array below
    $scripts_to_defer = array('smartmenus', 'admin-bar');
    foreach ($scripts_to_defer as $defer_script) {
        if ($defer_script === $handle) {
            return str_replace(' src', ' defer="defer" src', $tag);
        }
    }
    return $tag;
}
add_filter('script_loader_tag', 'add_defer_attribute', 10, 2);