Function GUILD_MEMBER_UPDATE
- GUILD_MEMBER_UPDATE(data, shard): Promise<void>
 Parameters
- data: { 
    avatar: null | string; 
    avatar_decoration_data?: null | RawAvatarDecorationData; 
    communication_disabled_until?: null | string; 
    deaf?: boolean; 
    flags?: number; 
    guild_id: string; 
    joined_at: null | string; 
    mute?: boolean; 
    nick?: null | string; 
    pending?: boolean; 
    premium_since?: null | string; 
    roles: string[]; 
    user: RawUser; 
}avatar: null | string
Optional communication_disabled_until?: null | string
Optional deaf?: boolean
Optional flags?: number
guild_id: string
joined_at: null | string
Optional mute?: boolean
Optional nick?: null | string
Optional pending?: boolean
Optional premium_since?: null | string
roles: string[]
 - shard: Shard