Express addition

node_modules/core-js/modules/_property-desc.js

@@ -0,0 +1,8 @@
+module.exports = function (bitmap, value) {
+  return {
+    enumerable: !(bitmap & 1),
+    configurable: !(bitmap & 2),
+    writable: !(bitmap & 4),
+    value: value
+  };
+};