Express addition

node_modules/core-js/modules/es6.string.includes.js

@@ -0,0 +1,12 @@
+// 21.1.3.7 String.prototype.includes(searchString, position = 0)
+'use strict';
+var $export = require('./_export');
+var context = require('./_string-context');
+var INCLUDES = 'includes';
+
+$export($export.P + $export.F * require('./_fails-is-regexp')(INCLUDES), 'String', {
+  includes: function includes(searchString /* , position = 0 */) {
+    return !!~context(this, searchString, INCLUDES)
+      .indexOf(searchString, arguments.length > 1 ? arguments[1] : undefined);
+  }
+});