[Fix: 8] Handling for PINGREQ that does not have ID but requires Ack-type PINGRESP
[Feature] Adding a DebugTerminal class to the MQTT Base library.

francois-normandin was a contributor to this release

MQTT Connection class now inherits from the common Connection base class, which merges the other libraries' dependencies into a common non-MQTT-related stack.

This is a breaking change to MQTT Stack 3.x, although a simple relink to class would suffice.
I'm reving up the major version to indicate that all the MQTT stack should follow to version 4.x

[Fix: 4] setConnected now executes even with upstream error
[Fix: 6] session process will not hang if some loops terminate.

francois-normandin was a contributor to this release

- Subscription and TopicFilter classes have been moved to Server library
[MQTT-6.0.0-1] Added error 55031 for Protocol Violation of type "Text Frame received over Websockets"

francois-normandin was a contributor to this release

- Addition of public event for connection and disconnection
- Addition of "reason" code for disconnection
- Addition of "isSessionConnected" method to MQTT Base API
- Session now self-terminates inside the process (more consistent with fire & forget nature of the session within the MQTT Base class)

francois-normandin was a contributor to this release

Initial Release of MQTT Connection and MQTT Base to remove client and broker code from this library. This will provide a more lightweight code base for those developers keen on creating their own client and brokers built on smaller parts.
This library abstracts the connection class which will be used to provide a dependency injectable abstraction for the client and server architecture. The abstract connection ties into the base class through the use of a session.

francois-normandin was a contributor to this release