Currently, the server runs on Java 8 and some plugins, notably Terrain Control depend on a version-specific hack. Now, we do want to drop TC anyway to upgrade to 1.14.4 but there's also the goal of sharing this plugin for others, who likely run Java 8.
It took me a while to figure out how to make it work with Lombok - have to use the right order.
Removed Vault repo as it seems to be offline and wasn't even used
Fixed CommandSender type, no subcommands handling
Made the default handler use the correct sender type (actually, the generic type might be completely unnecessary but oh well)
No longer checking param types to match methods (needed for generic types)
Fixed/implemented number handling in config
Fixed help text error
Fixed annotation processing in other plugins
Fixed error message on console chat
Fixed CI building (hopefully) - Spigot repo
