Add gtag

_config.yml

@@ -5,7 +5,6 @@ description:      'Game design, and musings on life in general'
 baseurl:          /
 url:              https://chrisglein.com
 paginate:         5
-google_analytics_id: G-G00GHWLPKL
 
 # About/contact
 author:

_includes/head.html

@@ -27,14 +27,12 @@
 
   <link rel="alternate" type="application/rss+xml" title="RSS" href="{{ '/atom.xml' | absolute_url }}">
 
-  {% if site.google_analytics_id %}
+  <script async src="https://www.googletagmanager.com/gtag/js?id=G-G00GHWLPKL"></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','//www.google-analytics.com/analytics.js','ga');
-    ga('create', '{{ site.google_analytics_id }}', 'auto');
-    ga('send', 'pageview');
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+
+    gtag('config', 'G-G00GHWLPKL');
   </script>
-  {% endif %}
-</head>
+</head>