Atualização do código javascript para registrar dados no GA googleana…

…lytics (#1903)

opac/webapp/templates/base.html

@@ -27,15 +27,13 @@
 
     {% if not config.DEBUG and config.GA_TRACKING_CODE %}
     <!-- Google Analytics -->
+      <script async src="https://www.googletagmanager.com/gtag/js?id={{ config.GA_TRACKING_CODE }}"></script>
       <script>
-        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-        })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-
-        ga('create', '{{ config.GA_TRACKING_CODE }}', 'auto');
-        ga('send', 'pageview');
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
 
+        gtag('config', '{{ config.GA_TRACKING_CODE }}');
       </script>
       <!-- End Google Analytics -->
     {% endif %}