Establish strategy for CLS compliance

[pglombardo]

🚀 Feature Request

Because of the nature of the MQTT protocol, we make use of specific byte length and signed/unsigned variables that turn out to be non CLS compliant.

CLS compliance includes rules like:

Unsigned types should not be part of the public interface of the class.

The library uses UInt8, ushort and other similar types throughout. We likely have to do a full review to be CLS compliant.

📎 Additional context

[pglombardo]

We are now CLS-compliant 💪