message: fix member typings
diff: import { ChannelType, UserPayload } from "./guild.ts";
  import { MemberCreatePayload } from "./member.ts";
  import { Channel } from "../structures/channel.ts";
  -import { Member } from "../structures/member.ts";
  export interface MentionedUser extends UserPayload {
  - member: Member;
  + member: MemberCreatePayload;
  }
  export interface Mentioned_Channel {
  @@ -236,7 +235,7 @@ export interface MessageCreateOptions {
  /** The author of this message (not guaranteed to be a valid user such as a webhook.) */
  author: UserPayload;
  /** The member properties for this message's author. Can be partial. */
  - member?: Member;
  + member?: MemberCreatePayload;
  /** The contents of the message */
  content: string;
  /** When this message was sent */
  