Changes:
- Separate chat and event messages into different webhooks (thanks @Setadokalo)
- Dependencies are now finally listed in the fabric.mod.json (again, thanks @Setadokalo)
- Update Fabric Language Kotlin from 1.4.30+build.2 to 1.5.0+kotlin.1.4.31
- Update Fabric API from 0.26.3+1.16 to 0.32.0+1.16
- Fix a potential race condition when stopping the server
- Send broadcast messages on the server thread rather than on the Discord gateway thread