Fix [p]unsubscribe from all
Motivation:
The methods of unsubscribing from all channels / patterns were not working as expected as they need to be special-case handled.
Modifications:
- Change:
RedisPubSubHandler
to be special-case unsubscribe when no arguments are provided
Result:
Developers should now properly be able to unsubscribe from all channels / patterns with a single method call.