Release 1.1.21

• More appropriate chat session race condition fix
• Send brand and ClientSettings to the backend server then using 1.20.2+ client
• Don't call onDisconnect multiple times for 1.20.2+ client
• Reimplement "KickCallback"
• Support for 1.19.3+ chat signing
• Add config option to force disable 1.19.3+ chat signing
• Discard information from previous server then joining into limbo
• Remove player from tablist then transferring to the server on 1.19.1 and lower
• Fix chat messages doesn't show on 1.19 client
• Add 1.20.3 to available versions
• Change copyright & first launch message year to 2024
• Velocity b349+ support