PHPMQTT v1.3.2 版本发布，优化 MQTT5 相关支持

添加 toArray 方法

在上个版本中为 getContents 方法增加了一个 getArray 参数来用于客户端回复对端 ACK，此版本中增加了 toArray 方法进行获取：

use Simps\MQTT\Message;
use Simps\MQTT\Protocol\ProtocolInterface;

$message = new Message\Publish();
$message->setProtocolLevel(ProtocolInterface::MQTT_PROTOCOL_LEVEL_5_0)
    ->setTopic('simps/mqtt/message')
    ->setQos(ProtocolInterface::MQTT_QOS_1)
    ->setDup(ProtocolInterface::MQTT_DUP_0)
    ->setRetain(ProtocolInterface::MQTT_RETAIN_0)
    ->setMessage('this is content')
    ->setMessageId(1)
    ->setProperties(['message_expiry_interval' => 100]);

$array1 = $message->getContents(true);
$array2 = $message->toArray();
assert($array1 === $array2);

两者的结果相同。

优化 getProtocolLevel

MQTT5 协议中增加了一个 Properties 属性，而 MQTT3.x 中是没有的，之前的版本如果是 MQTT5 协议的话需要手动调用setProtocolLevel来设置协议等级，此版本中就增加优化：判断是否设置了Properties 属性，如果设置了但协议等级不是 MQTT5 则自动设置为 MQTT5

Message

use Simps\MQTT\Message;
use Simps\MQTT\Protocol\ProtocolInterface;

$message = new Message\Publish();
$message->setTopic('simps/mqtt/message')
    ->setQos(ProtocolInterface::MQTT_QOS_1)
    ->setDup(ProtocolInterface::MQTT_DUP_0)
    ->setRetain(ProtocolInterface::MQTT_RETAIN_0)
    ->setMessage('this is content')
    ->setMessageId(1);

assert($message->isMQTT5() === false);
assert($message->getProtocolLevel() === ProtocolInterface::MQTT_PROTOCOL_LEVEL_3_1_1);

$message->setProperties(['message_expiry_interval' => 100]);
assert($message->isMQTT5() === true);
assert($message->getProtocolLevel() === ProtocolInterface::MQTT_PROTOCOL_LEVEL_5_0);

$message->setProtocolLevel(ProtocolInterface::MQTT_PROTOCOL_LEVEL_3_1);
assert($message->isMQTT5() === true);
assert($message->getProtocolLevel() === ProtocolInterface::MQTT_PROTOCOL_LEVEL_5_0);

Config

use Simps\MQTT\Client;
use Simps\MQTT\Config\ClientConfig;
use Simps\MQTT\Protocol\ProtocolInterface;

$config = new ClientConfig();
$config->setClientId(Client::genClientID())
    ->setKeepAlive(10)
    ->setDelay(3000)
    ->setMaxAttempts(5)
    ->setProperties([
        'session_expiry_interval' => 100,
    ])
    ->setSwooleConfig([
        'open_mqtt_protocol' => true,
        'package_max_length' => 2 * 1024 * 1024,
    ]);

assert($config->isMQTT5() === true);
assert($config->getProtocolLevel() === ProtocolInterface::MQTT_PROTOCOL_LEVEL_5_0);