maintenance release
Pre-release
      Pre-release
    
        - improve the way channels are managed in monoco:
- to create a channel: users have to override MonocoChannelEvent schemas and create their own channel.
 - to send a message: users just need to send an event (no more need to call send method of channel component).
 - to listen to a message: users just need to listen the event on their channel (no more need to call listen method of channel component).
 
 - remove channel component,
 - update MonocoChannel schemas,
 - add MonocoChannelEvent schemas,
 - improve metamodel module api for inheritance,
 - update jsdoc.