1.5.1 is a patch release. Key changes include:

• [fix] Avoid swallowing exceptions thrown by user event handlers;
• [test] Use client function to unify client in test script.

1.5.0 is a minor release. Key changes include:

• [feature] stop append /# before id when no namespace;
• [feature] Add a 'disconnecting' event to access to socket.rooms upon disconnection.