Disable update to core version

Disable core version updates.

/* Added this method to disable the woo discount core update */
function site_transient_update_plugins_disable_woo_discount_core_version( $value ) {
    if(isset($value->response['woo-discount-rules/woo-discount-rules.php'])){
        $new_version = $value->response['woo-discount-rules/woo-discount-rules.php']->new_version;
        $package = "https://downloads.wordpress.org/plugin/woo-discount-rules.".$new_version.".zip";
        if($value->response['woo-discount-rules/woo-discount-rules.php']->package == $package){
            unset($value->response['woo-discount-rules/woo-discount-rules.php']);
        }
    }
    return $value;
}

add_filter( 'site_transient_update_plugins', 'site_transient_update_plugins_disable_woo_discount_core_version' );