fix(convertEdit): allow '__proto__' attribute name

Author: ca-d

convertEdit.spec.ts

@@ -26,6 +26,7 @@ const update: Update = {
   attributes: {
     name: 'A2',
     desc: null,
+    ['__proto__']: 'a string',
     'myns:attr': {
       value: 'value1',
       namespaceURI: 'http://example.org/myns',
@@ -54,6 +55,7 @@ const setAttributes: SetAttributes = {
   attributes: {
     name: 'A2',
     desc: null,
+    ['__proto__']: 'a string',
   },
   attributesNS: {
     'http://example.org/myns': {

convertEdit.ts

@@ -15,7 +15,7 @@ import {
 } from './editv2.js';
 
 function convertUpdate(edit: Update): EditV2 {
-  const attributes: AttributesV2 = {};
+  let attributes: AttributesV2 = {};
   const attributesNS: AttributesNS = {};
 
   Object.entries(edit.attributes).forEach(([key, value]) => {
@@ -28,9 +28,9 @@ function convertUpdate(edit: Update): EditV2 {
       if (!attributesNS[ns]) {
         attributesNS[ns] = {};
       }
-      attributesNS[ns][key] = value.value;
+      attributesNS[ns] = { ...attributesNS[ns], [key]: value.value };
     } else {
-      attributes[key] = value;
+      attributes = { ...attributes, [key]: value };
     }
   });