update node modules

node_modules/jsdom/lib/api.js

@@ -19,7 +19,7 @@ const NoOpResourceLoader = require("./jsdom/browser/resources/no-op-resource-loa
 class CookieJar extends toughCookie.CookieJar {
   constructor(store, options) {
     // jsdom cookie jars must be loose by default
-    super(store, Object.assign({ looseMode: true }, options));
+    super(store, { looseMode: true, ...options });
   }
 }
 
@@ -27,7 +27,7 @@ const window = Symbol("window");
 let sharedFragmentDocument = null;
 
 class JSDOM {
-  constructor(input, options = {}) {
+  constructor(input = "", options = {}) {
     const mimeType = new MIMEType(options.contentType === undefined ? "text/html" : options.contentType);
     const { html, encoding } = normalizeHTML(input, mimeType);
 
@@ -163,7 +163,7 @@ function normalizeFromURLOptions(options) {
 
   // Normalization of options which must be done before the rest of the fromURL code can use them, because they are
   // given to request()
-  const normalized = Object.assign({}, options);
+  const normalized = { ...options };
 
   if (options.referrer !== undefined) {
     normalized.referrer = (new URL(options.referrer)).href;
@@ -180,7 +180,7 @@ function normalizeFromURLOptions(options) {
 }
 
 function normalizeFromFileOptions(filename, options) {
-  const normalized = Object.assign({}, options);
+  const normalized = { ...options };
 
   if (normalized.contentType === undefined) {
     const extname = path.extname(filename);
@@ -282,12 +282,10 @@ function transformOptions(options, encoding, mimeType) {
     transformed.windowOptions.storageQuota = Number(options.storageQuota);
   }
 
-  // concurrentNodeIterators??
-
   return transformed;
 }
 
-function normalizeHTML(html = "", mimeType) {
+function normalizeHTML(html, mimeType) {
   let encoding = "UTF-8";
 
   if (ArrayBuffer.isView(html)) {