update dependency after merge from master

node_modules/@xmldom/xmldom/lib/conventions.js

@@ -22,6 +22,31 @@ function freeze(object, oc) {
 	return oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object
 }
 
+/**
+ * Since we can not rely on `Object.assign` we provide a simplified version
+ * that is sufficient for our needs.
+ *
+ * @param {Object} target
+ * @param {Object | null | undefined} source
+ *
+ * @returns {Object} target
+ * @throws TypeError if target is not an object
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
+ * @see https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.assign
+ */
+function assign(target, source) {
+	if (target === null || typeof target !== 'object') {
+		throw new TypeError('target is not an object')
+	}
+	for (var key in source) {
+		if (Object.prototype.hasOwnProperty.call(source, key)) {
+			target[key] = source[key]
+		}
+	}
+	return target
+}
+
 /**
  * All mime types that are allowed as input to `DOMParser.parseFromString`
  *
@@ -139,6 +164,7 @@ var NAMESPACE = freeze({
 	XMLNS: 'http://www.w3.org/2000/xmlns/',
 })
 
+exports.assign = assign;
 exports.freeze = freeze;
 exports.MIME_TYPE = MIME_TYPE;
 exports.NAMESPACE = NAMESPACE;