Express addition

node_modules/core-js/modules/_fails-is-regexp.js

@@ -0,0 +1,12 @@
+var MATCH = require('./_wks')('match');
+module.exports = function (KEY) {
+  var re = /./;
+  try {
+    '/./'[KEY](re);
+  } catch (e) {
+    try {
+      re[MATCH] = false;
+      return !'/./'[KEY](re);
+    } catch (f) { /* empty */ }
+  } return true;
+};