message: change: member.joinedAt can be undefined
diff: @@ -162,7 +162,7 @@ export async function createDiscordenoMember(
  member.guilds.set(guildId, {
  nick: data.nick,
  roles: data.roles.map((id) => snowflakeToBigint(id)),
  - joinedAt: Date.parse(joinedAt),
  + joinedAt: joinedAt ? Date.parse(joinedAt) : undefined,
  premiumSince: premiumSince ? Date.parse(premiumSince) : undefined,
  deaf: data.deaf,
  mute: data.mute,
  @@ -180,7 +180,7 @@ export interface DiscordenoMember extends Omit<User, "discriminator" | "id"> {
  guilds: Collection<
  bigint,
  Omit<GuildMember, "joinedAt" | "premiumSince" | "roles"> & {
  - joinedAt: number;
  + joinedAt?: number;
  premiumSince?: number;
  roles: bigint[];
  }
  @@ -214,7 +214,7 @@ export interface DiscordenoMember extends Omit<User, "discriminator" | "id"> {
  guildId: bigint,
  ):
  | (Omit<GuildMember, "joinedAt" | "premiumSince" | "roles"> & {
  - joinedAt: number;
  + joinedAt?: number;
  premiumSince?: number;
  roles: bigint[];
  })
  