Deprecated uasort()

Hello. About a year ago, a member of your plugin provided the following code to me:

function ace_sort_woocommerce_available_shipping_methods( $rates, $package ) {
uasort( $rates, function($a, $b) {
return $b->get_cost() < $a->get_cost();
});
return $rates;
}
add_filter( ‘woocommerce_package_rates’ , ‘ace_sort_woocommerce_available_shipping_methods’, 10, 2 );

Today when checked debug, there was a warning that said “Deprecated: uasort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /home/collec26/public_html/wp-content/themes/universal-store/functions.php on line 490”

Can you please tell me how to update this code accordingly?

Thank you for your time.

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