Changes

Summary

1. Add new message types for Threads (#1759) (commit: d53cac9) (details)

Commit d53cac9ab944e771f49f5f176713cdde35d5e979 by noreply Add new message types for Threads (#1759) (commit: d53cac9)
	src/main/java/net/dv8tion/jda/api/entities/MessageHistory.java (diff)
	src/main/java/net/dv8tion/jda/api/entities/MessageType.java (diff)