Function THREAD_MEMBERS_UPDATE
- THREAD_MEMBERS_UPDATE(data, shard): Promise<void>
 Parameters
- data: { 
    added_members: (RawThreadMember & { 
        member: RawMember; 
        presence: null | PresenceUpdate; 
    })[]; 
    guild_id: string; 
    id: string; 
    member_count: number; 
    removed_member_ids: string[]; 
}guild_id: string
id: string
member_count: number
removed_member_ids: string[]
 - shard: Shard