add some packages

node_modules/core-js/modules/_object-assign.js

@@ -0,0 +1,34 @@
+'use strict';
+// 19.1.2.1 Object.assign(target, source, ...)
+var getKeys = require('./_object-keys');
+var gOPS = require('./_object-gops');
+var pIE = require('./_object-pie');
+var toObject = require('./_to-object');
+var IObject = require('./_iobject');
+var $assign = Object.assign;
+
+// should work with symbols and should have deterministic property order (V8 bug)
+module.exports = !$assign || require('./_fails')(function () {
+  var A = {};
+  var B = {};
+  // eslint-disable-next-line no-undef
+  var S = Symbol();
+  var K = 'abcdefghijklmnopqrst';
+  A[S] = 7;
+  K.split('').forEach(function (k) { B[k] = k; });
+  return $assign({}, A)[S] != 7 || Object.keys($assign({}, B)).join('') != K;
+}) ? function assign(target, source) { // eslint-disable-line no-unused-vars
+  var T = toObject(target);
+  var aLen = arguments.length;
+  var index = 1;
+  var getSymbols = gOPS.f;
+  var isEnum = pIE.f;
+  while (aLen > index) {
+    var S = IObject(arguments[index++]);
+    var keys = getSymbols ? getKeys(S).concat(getSymbols(S)) : getKeys(S);
+    var length = keys.length;
+    var j = 0;
+    var key;
+    while (length > j) if (isEnum.call(S, key = keys[j++])) T[key] = S[key];
+  } return T;
+} : $assign;