v1.3.0 for Paper 1.21.4

Additions

• Added new config option prevent-void-damage-in-spec in config.yml to prevent players in spec from taking damage from the void and dying.

Changes & Fixes

• Switched from using the Spigot API to using the Paper API
• Works with Minecraft 1.21.4
  • Specifically, floating heads displayed by ProtocolLib now work properly again for Minecraft 1.21.4.

Other Notes

• This version of SlashSpec has been tested to work with ProtocolLib 5.3.0.

Full Changelog: v1.2.0...v1.3.0