RFC6455 Socket implementation incompatible with ProtocolInterface about phpsocket.io

[PhilLehmann]

Basically, only the types for the first parameters of the following three methods were missing. When I add them locally in file workerman\workerman\Protocols\ProtocolInterface.php, it works fine:

interface ProtocolInterface
{
    /**
     * Check the integrity of the package.
     * Please return the length of package.
     * If length is unknow please return 0 that mean wating more data.
     * If the package has something wrong please return false the connection will be closed.
     *
     * @param string              $recv_buffer
     * @param ConnectionInterface $connection
     * @return int|false
     */
    public static function input(string $recv_buffer, ConnectionInterface $connection);

    /**
     * Decode package and emit onMessage($message) callback, $message is the result that decode returned.
     *
     * @param string              $recv_buffer
     * @param ConnectionInterface $connection
     * @return mixed
     */
    public static function decode(string $recv_buffer, ConnectionInterface $connection);

    /**
     * Encode package brefore sending to client.
     * 
     * @param mixed               $data
     * @param ConnectionInterface $connection
     * @return string
     */
    public static function encode(mixed $data, ConnectionInterface $connection);
}