🚚 ➕ add node-signpdf copy to signing packgage until npm includes fix

packages/signing/node-signpdf/dist/helpers/pdfkitReferenceMock.js

@@ -0,0 +1,29 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _abstract_reference = _interopRequireDefault(require("./pdfkit/abstract_reference"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+class PDFKitReferenceMock extends _abstract_reference.default {
+  constructor(index, additionalData = undefined) {
+    super();
+    this.index = index;
+
+    if (typeof additionalData !== 'undefined') {
+      Object.assign(this, additionalData);
+    }
+  }
+
+  toString() {
+    return `${this.index} 0 R`;
+  }
+
+}
+
+var _default = PDFKitReferenceMock;
+exports.default = _default;