Configring node js.

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

@@ -0,0 +1,33 @@
+'use strict';
+// 19.1.2.1 Object.assign(target, source, ...)
+var getKeys  = require('./_object-keys')
+  , gOPS     = require('./_object-gops')
+  , pIE      = require('./_object-pie')
+  , toObject = require('./_to-object')
+  , IObject  = require('./_iobject')
+  , $assign  = Object.assign;
+
+// should work with symbols and should have deterministic property order (V8 bug)
+module.exports = !$assign || require('./_fails')(function(){
+  var A = {}
+    , B = {}
+    , S = Symbol()
+    , 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)
+    , aLen  = arguments.length
+    , index = 1
+    , getSymbols = gOPS.f
+    , isEnum     = pIE.f;
+  while(aLen > index){
+    var S      = IObject(arguments[index++])
+      , keys   = getSymbols ? getKeys(S).concat(getSymbols(S)) : getKeys(S)
+      , length = keys.length
+      , j      = 0
+      , key;
+    while(length > j)if(isEnum.call(S, key = keys[j++]))T[key] = S[key];
+  } return T;
+} : $assign;