Define Google Font Weights To Be Enqueued

/**
 * Alter the font-weights to be loaded with your selected Google Fonts
 * as defined at Customizer > Typography
 *
 * @link  http://total.wpexplorer.com/docs/snippets/google-font-weights/
 * @see   framework/fonts.php
 * @since 3.3.2
 *
 * @return array
 */
function myprefix_wpex_google_font_enqueue_weights( $weights ) {
	$weights = array( '100', '200', '300', '400', '500', '600', '700', '800', '900' );
	return $weights;
}
add_filter( 'wpex_google_font_enqueue_weights', 'myprefix_wpex_google_font_enqueue_weights' );