added migrations for instant delivery

node_modules/react-router/lib/supportsHistory.js

@@ -0,0 +1,16 @@
+'use strict';
+
+function supportsHistory() {
+  /*! taken from modernizr
+   * https://github.com/Modernizr/Modernizr/blob/master/LICENSE
+   * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
+   * changed to avoid false negatives for Windows Phones: https://github.com/rackt/react-router/issues/586
+   */
+  var ua = navigator.userAgent;
+  if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) {
+    return false;
+  }
+  return window.history && 'pushState' in window.history;
+}
+
+module.exports = supportsHistory;