Changelog:

• Dropped support for LuckPerms 4
• Added check-for-updates in the config. Since spiget.org sometimes throws server-side error, now you can disable version checking, if it bothers you.
• Updated other libraries

bStats shows that only 1.5% of servers are using old LuckPerms 4, so my apology to those 5 servers. Now plugin will show warning message and fallback to Vault for groups, if LP 4 was found.

And addressing elephant in the room, no, HEX colors and other features of JSON-based components are not supported. Sadly, Minecraft Client renders server brand as plain string.

Velocity support also not planned.