The payload of :guild_stickers_update: a guild's full sticker list after
a change. old is the list as cached, or nil when the guild isn't cached.
Summary
Types
@type t() :: %Lingo.Event.GuildStickersUpdate{ guild_id: String.t(), old: [Lingo.Type.Sticker.t()] | nil, stickers: [Lingo.Type.Sticker.t()] }