added migrations for instant delivery

node_modules/react-router/lib/behaviors/ScrollToTopBehavior.js

@@ -0,0 +1,15 @@
+/**
+ * A scroll behavior that always scrolls to the top of the page
+ * after a transition.
+ */
+"use strict";
+
+var ScrollToTopBehavior = {
+
+  updateScrollPosition: function updateScrollPosition() {
+    window.scrollTo(0, 0);
+  }
+
+};
+
+module.exports = ScrollToTopBehavior;