MagicKPvP 1.2.1

Paper migration. The plugin now loads as a Paper plugin, so Spigot servers are no longer supported.

Changed

• plugin.yml is replaced by paper-plugin.yml. Dependencies (Vault required; WorldGuard, LuckPerms, PlaceholderAPI and Nexo optional) now load before the plugin.
• Libraries (Kotlin stdlib, HikariCP, SQLite, MySQL) are resolved by a new MagicKPvPPluginLoader instead of the libraries: list.
• /magickpvp (alias /mkp) and /spawn are rebuilt on Paper's Brigadier command API, which gives argument validation and tab completion.
• /spawn is registered as a main label, so it overrides another plugin's /spawn instead of deferring to it.
• All Bukkit scheduler calls now use Paper's schedulers: global region for abilities, spawn countdown and menu tasks, async for leaderboard refresh. The ability tick now starts after 1 tick instead of 0.
• Arena command handling is split into setOrAdd and removeSpot, which the new command tree calls.

Improved

• PlaceholderAPI registration now logs whether the magickpvp expansion registered, with a hint to run /papi list if it didn't. It also logs when PlaceholderAPI isn't installed.