add some packages

node_modules/core-js/modules/es7.object.get-own-property-descriptors.js

@@ -0,0 +1,22 @@
+// https://github.com/tc39/proposal-object-getownpropertydescriptors
+var $export = require('./_export');
+var ownKeys = require('./_own-keys');
+var toIObject = require('./_to-iobject');
+var gOPD = require('./_object-gopd');
+var createProperty = require('./_create-property');
+
+$export($export.S, 'Object', {
+  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {
+    var O = toIObject(object);
+    var getDesc = gOPD.f;
+    var keys = ownKeys(O);
+    var result = {};
+    var i = 0;
+    var key, desc;
+    while (keys.length > i) {
+      desc = getDesc(O, key = keys[i++]);
+      if (desc !== undefined) createProperty(result, key, desc);
+    }
+    return result;
+  }
+});