message: Add MESSAGE_CONTENT intent
  * Add MESSAGE_CONTENT intent
  Closes
  * Stick with code style
diff: @@ -67,7 +67,8 @@ export enum GatewayIntents {
  GUILD_MESSAGE_TYPING = 1 << 11,
  DIRECT_MESSAGES = 1 << 12,
  DIRECT_MESSAGE_REACTIONS = 1 << 13,
  - DIRECT_MESSAGE_TYPING = 1 << 13
  + DIRECT_MESSAGE_TYPING = 1 << 13,
  + MESSAGE_CONTENT = 1 << 15
  }
  export enum GatewayEvents {
  