message: work for : fix vue building
diff: @@ -99,7 +99,7 @@ export class MatrixCell extends Vue {
  return null;
  }
  getCellIndex(): string {
  - return this.cell["index"] || "";
  + return (this.cell as any).index || "";
  }
  mounted() {
  if (!this.cell.hasQuestion || !this.question || !this.question.survey) return;
  