Update google-analytics

layout/_partial/google-analytics.ejs

@@ -1,12 +1,13 @@
 <% if (theme.google_analytics){ %>
-    <!-- Global site tag (gtag.js) - Google Analytics -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id=UA-69833742-2"></script>
-    <script>
-      window.dataLayer = window.dataLayer || [];
-      function gtag(){dataLayer.push(arguments);}
-      gtag('js', new Date());
+<!-- Google Analytics -->
+<script type="text/javascript">
+  (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');
 
-      gtag('config', '<%=theme.google_analytics%>');
-    </script>
-    <!-- End Google Analytics -->
+  ga('create', '<%= theme.google_analytics %>', 'auto');
+  ga('send', 'pageview');
+</script>
+<!-- End Google Analytics -->
 <% } %>