set up google analytics the new way

Author: hq9000

_config.yml

@@ -25,6 +25,7 @@ description: >- # this means to ignore newlines until "baseurl:"
 #baseurl: "" # the subpath of your site, e.g. /blog
 url: "" # the base hostname & protocol for your site, e.g. http://example.com
 # Build settings
+google_analytics: G-J900LXB0C2
 theme: minima
 plugins:
   - jekyll-feed

_includes/google-analytics.html

@@ -0,0 +1,9 @@
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-J900LXB0C2"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-J900LXB0C2');
+</script>