Protocol 3.4 and more

1. introduced 3.4 protocol! (and incidentally 3.2 as well). Thank you @Monacoslo for providing the test device for the development!
2. introduced the possibility to enable the pytuya module debugging only on selected devices, to reduce logs flooding if many devices are present. Debugging has to be enabled in the configuration.yaml file, and then the new button has to be checked when adding/editing a device
3. config flow now aborts with message when attempting to remove all entities from a device when editing it

Enjoy!