3.0.4 is a patch release. Key changes include:

• Diff: https://github.com/socketio/socket.io/compare/3.0.3...3.0.4;
• Client release: 3.0.4.

3.0.3 is a patch release. Key changes include:

• Diff: https://github.com/socketio/socket.io/compare/3.0.2...3.0.3;
• Client release: 3.0.3.

3.0.2 is a patch release. Key changes include:

• merge Engine.IO options (43705d7);
• Diff: https://github.com/socketio/socket.io/compare/3.0.1...3.0.2.

3.0.1 is a patch release. Key changes include:

• export ServerOptions and Namespace types (#3684) (f62f180);
• typings: update the signature of the emit method (50671d9).

3.0.0 is a major release. Key changes include:

• close clients with no namespace (91cd255);
• emit an Error object upon middleware error (54bf4a4).

3.0.0-rc4 is a pre-release release. Key changes include:

• emit an Error object upon middleware error (54bf4a4);
• serve msgpack bundle (aa7574f).

3.0.0-rc3 is a pre-release release. Key changes include:

• add support for catch-all listeners (5c73733);
• make Socket#join() and Socket#leave() synchronous (129c641).

3.0.0-rc2 is a pre-release release. Key changes include:

• close clients with no namespace (91cd255);
• remove duplicate _sockets map (8a5db7f).

3.0.0-rc1 is a pre-release release. Key changes include:

• add ES6 module export (8b6b100);
• do not reuse the Engine.IO id (2875d2c).

2.3.0 is a minor release. Key changes include:

• Milestone: 2.3.0;
• Diff: https://github.com/socketio/socket.io/compare/2.2.0...2.3.0.

3.0.4 is a patch release. Key changes include:

• Diff: https://github.com/socketio/socket.io/compare/3.0.3...3.0.4;
• Client release: 3.0.4.

3.0.3 is a patch release. Key changes include:

• Diff: https://github.com/socketio/socket.io/compare/3.0.2...3.0.3;
• Client release: 3.0.3.

3.0.2 is a patch release. Key changes include:

• merge Engine.IO options (43705d7);
• Diff: https://github.com/socketio/socket.io/compare/3.0.1...3.0.2.

3.0.1 is a patch release. Key changes include:

• export ServerOptions and Namespace types (#3684) (f62f180);
• typings: update the signature of the emit method (50671d9).

3.0.0 is a major release. Key changes include:

• close clients with no namespace (91cd255);
• emit an Error object upon middleware error (54bf4a4).

3.0.0-rc4 is a pre-release release. Key changes include:

• emit an Error object upon middleware error (54bf4a4);
• serve msgpack bundle (aa7574f).

3.0.0-rc3 is a pre-release release. Key changes include:

• add support for catch-all listeners (5c73733);
• make Socket#join() and Socket#leave() synchronous (129c641).

3.0.0-rc2 is a pre-release release. Key changes include:

• close clients with no namespace (91cd255);
• remove duplicate _sockets map (8a5db7f).

3.0.0-rc1 is a pre-release release. Key changes include:

• add ES6 module export (8b6b100);
• do not reuse the Engine.IO id (2875d2c).

2.3.0 is a minor release. Key changes include:

• Milestone: 2.3.0;
• Diff: https://github.com/socketio/socket.io/compare/2.2.0...2.3.0.