Channel ID can now be string - 01/03/2021

On popular demand, we have changed the allowed number of characters in the channel_id parameter of the WebSocket server API.

Updated doc: https://www.piesocket.com/docs/3.0/overview

Now:

- Channel ID can contain characters [a-z], [A-Z], [0-9] 
- Channel ID can contain special characters _ (underscore) and - (hyphen).

Thanks,
PieSocket Team