message: fix message.mentions
diff: @@ -28,7 +28,7 @@ export function createMessage(data: MessageCreateOptions) {
  member: () => message.guild()?.members.get(data.author.id)!,
  mentions: () =>
  data.mentions.map((mention) =>
  - message.guild()?.members.get(mention.id) || mention
  + message.guild()?.members.get(mention.id)!
  ),
  /** Delete a message */
  