message: fix: type error
  validate json value correctly
diff: @@ -226,7 +226,7 @@ export function astCreatorFactory(BaseCstVisitorClass: CstVisitorBase): CstVisit
  array(ctx): JsonNodes.ArrayNode {
  return {
  type: AstNodeType.JsonArray,
  - children: ctx.jsonValue.map(valueNode => this.visit(valueNode)),
  + children: ctx.jsonValue?.map(valueNode => this.visit(valueNode)),
  };
  }
  