[6.x] Update lock return type

[maxsky]

No description provided.

[driesvints]

This definitely isn't correct. The return type should always be a boolean.

[maxsky]

This definitely isn't correct. The return type should always be a boolean.

maybe return by $callback, source code same with 8.x

public function block($seconds, $callback = null)
{
    $starting = $this->currentTime();

    while (! $this->acquire()) {
        usleep(250 * 1000);

        if ($this->currentTime() - $seconds >= $starting) {
            throw new LockTimeoutException;
        }
    }

    if (is_callable($callback)) {
        try {
            return $callback();
        } finally {
            $this->release();
        }
    }

    return true;
}