Amqtt

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* removed hbmqtt compatibility, importing amqtt is now mandatory
* removed loop parameter from all functions
* Python 3.7 to 3.10 compatibility
* Fixed a major bug in plugin api, see https://github.com/Yakifo/amqtt/pull/92
* Fixed a major bug due to CancelledError semantics changed in Python 3.8, see https://github.com/Yakifo/amqtt/pull/134

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* first release under new package name: amqtt
* reworked unit tests
* dropped support for python3.5 and earlier
* added support for python3.8 and 3.9
* Pass in loop to PluginManager, from https://github.com/beerfactory/hbmqtt/pull/126
* Fixes taboo topic checking without session username, from https://github.com/beerfactory/hbmqtt/pull/151
* Move scripts module into hbmqtt module, from https://github.com/beerfactory/hbmqtt/pull/167
* Download mosquitto certificate on the fly
* importing `hbmqtt` is deprecated, use `amqtt`
* Security fix: If an attacker could produce a KeyError inside an authentication plugin, the authentication was accepted instead of rejected

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* fix `more issues <https://github.com/beerfactory/hbmqtt/milestone/11?closed=1>`_
* fix a `few issues <https://github.com/beerfactory/hbmqtt/milestone/10?closed=1>`_

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* fix a `few issues <https://github.com/beerfactory/hbmqtt/milestone/9?closed=1>`_

.....

* See commit log

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* fix a `serie of issues <https://github.com/beerfactory/hbmqtt/milestone/8?closed=1>`_
* improve plugin performance
* support Python 3.6
* upgrade to ``websockets`` 3.3.0