Fix: abort case
Add Result and Call messages definition, and an example of RPC (ping)
Linting
Fix CALL processor
Fix broken test
Fix Call/Error messages behaviors
Lint
Update README
Add SUBSCRIBE and SUBSCRIBED messages (PubSub-related)
(in progress) SUBSCRIBE support (tests missing)
General fixes and test coverage from 88% to 99%.
Add messages PUBLISH, PUBLISHED and EVENT
Refactor in publishers & subscribers connection representation
Add PUBLISH-PUBLISHED-EVENT flow (tests under dev)
Fix pubsub behavior
Refactor Processor.groups_messages -> direct_messages
Allow RPC calls to return direct_messages to other connections
Normalize that direct_messages should be a list
Fix RPC Call support direct_messages to other websockets
Fix PubSub publish processor