* Composite entities require multiple value types to be present in
child values to function. Any of those value types should trigger an
entity update if updated.
* Always write platform v names as sets.
* Run black.
* Try to make the process more readable and paritioned.
* Validate child values using set message.
* Only validate using relevant schemas.
* Extract node validation.
* Rework const types and schemas.
* Rework child validator.
* Enhance warning logging message.
* Refactor mysensors message handling
* Add handler module and register handlers per message type or message
sub-type. This will allow easier extension of message handling in the
future.
* Move some common functions to a helpers module.
* Add node handler and signal
* Fix inconsistent return
* Upgrade pymysensors to 0.18.0
* Fix bug in message modification.
Martin Hjelmare
Paulus Schoutsen