Upgrade to G4A

_includes/footer.html

@@ -110,29 +110,14 @@
 </footer>
 <!-- /.footer -->
 
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-DJ7RJ4F2Z1"></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",
-    "https://www.google-analytics.com/analytics.js",
-    "ga"
-  );
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
 
-  ga("create", "{{ site.google_analytics }}", "auto");
-  ga("send", "pageview");
+  gtag('config', 'G-DJ7RJ4F2Z1');
 </script>
 
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>