Use latest instantsearch version

src/Packagist/WebBundle/Resources/views/layout.html.twig

@@ -210,7 +210,7 @@
         <script src="{{ asset('libs/humane-3.2.2.min.js') }}"></script>
         <script src="{{ asset('bundles/packagistweb/js/layout.js') }}"></script>
         <script src="{{ asset('libs/bootstrap-3.3.5/js/bootstrap.min.js')}}"></script>
-        <script src="https://cdn.jsdelivr.net/npm/instantsearch.js@1/dist/instantsearch-preact.min.js"></script>
+        <script src="https://cdn.jsdelivr.net/npm/instantsearch.js@2.1.3/dist/instantsearch.min.js"></script>
         <script src="{{ asset('bundles/packagistweb/js/search.js') }}"></script>
 
         {%- if not app.debug and google_analytics.ga_key %}