Merge pull request #69 from m-lab/sandbox-kinkade

Uses Google Analytics 4 tracking tag + removes Travis-CI config

app/index.html

@@ -64,14 +64,14 @@
 	  <script src="measure/measure.js"></script>
 	  <script src="services/gaugeService.js"></script>
 	  <script src="app.js"></script>
+	  <!-- Google tag (gtag.js) -->
+	  <script async src="https://www.googletagmanager.com/gtag/js?id=G-WV41BWS391"></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', 'UA-56251309-2', 'auto');
-	   ga('send', 'pageview');
+	   gtag('config', 'G-WV41BWS391');
 	  </script>
 	</body>
 </html>