Merge pull request #406 from jdubois/migration-ga4

Migrate to Google Analytics v4

src/main/webapp/index.html

@@ -94,14 +94,13 @@ <h1>You must enable javascript to view this page.</h1>
             });
         }
     </script>
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-4L9RJVPGJT"></script>
     <script>
-        (function(b,o,i,l,e,r){b.GoogleAnalyticsObject=l;b[l]||(b[l]=
-            function(){(b[l].q=b[l].q||[]).push(arguments)});b[l].l=+new Date;
-            e=o.createElement(i);r=o.getElementsByTagName(i)[0];
-            e.src='//www.google-analytics.com/analytics.js';
-            r.parentNode.insertBefore(e,r)}(window,document,'script','ga'));
-        ga('create', 'UA-46075199-1', 'auto');
-        ga('send','pageview');
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+
+    gtag('config', 'G-4L9RJVPGJT');
     </script>
 </body>
 </html>