Append async to wp_enqueue_script

functions.php

<?php 
function advanced_asyc_scripts($url) {
	if ( strpos( $url, '#asyncload') === false ) {
		return $url;
	} else if ( is_admin() ) {
		return str_replace( '#asyncload', '', $url );
	} else {
		return str_replace( '#asyncload', '', $url )."' async='async'  defer='defer";
	}
}
add_filter( 'clean_url', 'advanced_asyc_scripts', 11, 1 );

add_action( 'wp_enqueue_scripts', 'the_outdoor_trip_enqueue_scripts' );

function the_outdoor_trip_enqueue_scripts() {	
	wp_enqueue_script( 'google-map', 'https://maps.googleapis.com/maps/api/js?key=AIzaSyA2I2cP6UiavrQHrhZBk_jVKhFsr1qYln0#asyncload', array('jquery'), '3', true );
}