Update analytics tag script.

Author: lapets

index.html

@@ -5,6 +5,10 @@
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Data Mechanics</title>
+<script async src="https://www.googletagmanager.com/gtag/js?id=UA-90403446-1"></script>
+<script>
+  window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-90403446-1');
+</script>
 <link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Alex+Brush">
 <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.1.0/styles/vs.min.css">