Updating NPM dependencies

node_modules/jest-util/build/deepCyclicCopy.js

@@ -13,21 +13,6 @@ exports.default = deepCyclicCopy;
  */
 const EMPTY = new Set();
 
-// Node 6 does not have gOPDs, so we define a simple polyfill for it.
-if (!Object.getOwnPropertyDescriptors) {
-  // @ts-ignore: polyfill
-  Object.getOwnPropertyDescriptors = obj => {
-    const list = {};
-    Object.getOwnPropertyNames(obj)
-      .concat(Object.getOwnPropertySymbols(obj))
-      .forEach(key => {
-        // @ts-ignore: assignment with a Symbol is OK.
-        list[key] = Object.getOwnPropertyDescriptor(obj, key);
-      });
-    return list;
-  };
-}
-
 function deepCyclicCopy(
   value,
   options = {
@@ -79,7 +64,7 @@ function deepCyclicCopyObject(object, options, cycles) {
 
 function deepCyclicCopyArray(array, options, cycles) {
   const newArray = options.keepPrototype
-    ? new (Object.getPrototypeOf(array)).constructor(array.length)
+    ? new (Object.getPrototypeOf(array).constructor)(array.length)
     : [];
   const length = array.length;
   cycles.set(array, newArray);