minor: forgot to set ctor props

dist/index.js

@@ -963,6 +963,8 @@ var ErrorWithCode = /** @class */ (function (_super) {
         var _this = _super.call(this) || this;
         _this.message = message;
         _this.code = code;
+        _this.code = code;
+        _this.message = message;
         return _this;
     }
     return ErrorWithCode;

src/index.ts

@@ -16,6 +16,8 @@ let done: boolean;
 class ErrorWithCode extends Error {
   constructor(readonly message: string, readonly code: number) {
     super();
+    this.code = code;
+    this.message = message;
   }
 }