Bump 1.6.6

Bump 1.6.5

Bump 1.6.4

Bump 1.6.3

feat: grpc-list:// scheme to support multiple addresses

Bump 1.6.1

Bump 1.6.0

Fix unsubscribe bug in hub.go

Fixed a bug where unsubscribing from a channel would sometimes leave
streams in the hub. This was caused by modifying the streams slice while
iterating over it, which could cause some streams to be skipped during
unsubscription.

The fix uses a two-step approach:
1. First collect all streams that need to be removed
2. Then remove them in a separate loop

This ensures all streams with the matching identifier are properly
unsubscribed.

refactor: trigger presence events from broker

fix: broadcast leave on usubscribe