OpGuard release 3.2.2

Update 3.2.2 "Clutter Cleanup"

Update Log:

• Build against Spigot for 1.12
• Remove all event and command injections.
  • Remove the infamous PlayerWrapper once and for all.
• Remove command exemptions.
  • Command exemptions are no longer needed because commands simply aren't injected anymore.
  • Plugin exemptions still do exist, however, to allow other plugins to execute /op, /deop, and /opguard.
• Remove PlugMan dependency.
  • Automatic PlugMan exempting is now done with reflection.
• Cleanup the config.
  • Remove the 'experimental' config options, since they mainly revolved around event injections.