message: Rename SetMetafield to SetMetafieldChange
diff: @@ -127,11 +127,15 @@ interface AddShippingLineChange {
  phone?: string;
  }
  -interface SetMetafield extends Metafield {
  +interface SetMetafieldChange extends Metafield {
  type: 'set_metafield';
  }
  -type Changes = (AddVariantChange | AddShippingLineChange | SetMetafield)[];
  +type Changes = (
  + | AddVariantChange
  + | AddShippingLineChange
  + | SetMetafieldChange
  +)[];
  interface Changeset {
  changes: Changes;
  