v0.8.0-rc2 Release

Refactored the realtime handler per #pocketbase-954 to allow registering multiple subscriptions to the same topic.

The collection realtime handler api now is:

// subscribe:
pb.collection("foo").subscribe("*", (e) => {});
pb.collection("foo").subscribe("YOUR_RECORD_ID", (e) => {});

// unsubscribe:
pb.collection("foo").unsubscribe("YOUR_RECORD_ID"); // remove every "YOUR_RECORD_ID" subscription
pb.collection("foo").unsubscribe("*");              // remove every "*" topic subscription
pb.collection("foo").unsubscribe();                 // remove every subscription in foo

Additionally, subscribe() now return UnsubscribeFunc that could be used to unsubscribe only from a single subscription listener.

The realtime handlers from v0.8.0-rc1 are soft-deprecated and will still work but there will be a console warning to replace them with their newer equivalent.