updated frontend stack to latest versions (#729)

templates/bundles/FOSUserBundle/Resetting/request.html.twig

@@ -5,13 +5,13 @@
 
 {% block head %}
     {{ parent() }}
-    <script src="{{ asset('build/app.js') }}"></script>
     {% include 'partials/head.html.twig' %}
 {% endblock %}
 
 {% block stylesheets %}
-    {# we do not call parent() as we use a custom built for the frontend assets and don't want the default <stylesheet> #}
-    <link rel="stylesheet" href="{{ asset('build/app.css') }}">
+    {{ encore_entry_link_tags('app') }}
 {% endblock %}
 
-{% block javascripts %}{% endblock %}
+{% block javascripts %}
+    {{ encore_entry_script_tags('app') }}
+{% endblock %}