[ECO-4780] Fix Connection closed error when using usePresence hook

[VeskeR]

Resolves #1753
Also seems to help with #1759 , ideally would confirm with the user that this fix helps with the problem once released.

ably.connection.state dependency in onUnmount callback caused the next issue:

When ably.connection.state is added as a dependency to the onUnmount callback, changes to the connection state will update this callback, which in turn triggers our mounting useEffect hook. This became problematic on page reloads: when the connection state changes to closed, the onUnmount callback updates, and this triggers our mounting useEffect hook, which calls onMount and tries to enter presence. Since the connection is closed at that point, we get a "Connection closed" error. Although it's not critical and doesn't seem to cause any application behavior issues, polluting the log with "Connection closed" errors should be avoided.

[ttypic]

Nice catch!

[ttypic]

LGTM