2.0.4

Following server version bump.

Links:

• Milestone: 2.0.4
• Diff: 2.0.3...2.0.4
• Server release: 2.0.4
• Diff engine.io-client: -
• Diff ws: -
• Build size
  • socket.io.js:
    • min: 59.3 KB
    • min+gzip: 19.0 KB
  • socket.io.slim.js:
    • min: 51.2 KB
    • min+gzip: 16.0 KB
• CDN
  • https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.4/socket.io.slim.js
  • https://cdn.socket.io/socket.io-2.0.4.slim.js