message: fix(chunking): cache user object too
diff: @@ -12,6 +12,7 @@ export const guildMembersChunk: GatewayEventHandler = async (
  for (const member of d.members) {
  await guild.members.set(member.user.id, member)
  + await gateway.client.users.set(member.user.id, member.user)
  }
  if (d.chunk_index === 0) await guild.presences.flush()
  