message: fix(types): camelize pack_id field
diff: @@ -5,7 +5,7 @@ export interface MessageSticker {
  /** id of the sticker */
  id: string;
  /** id of the pack the sticker is from */
  - pack_id: string;
  + packId: string;
  /** Name of the sticker */
  name: string;
  /** Description of the sticker */
  