Update to current analytics

_config.yml

@@ -71,9 +71,9 @@ social:
 
 # Analytics
 analytics:
-  provider               : "google-universal" # false (default), "google", "google-universal", "custom"
-  google:
-    tracking_id          : "UA-6070690-5"
+  provider               : "custom" # false (default), "google", "google-universal", "custom"
+
+google_analytics: "G-B7TVHGXVJZ"
 
 
 # Site Author

_includes/analytics-providers/custom.html

@@ -1,3 +1,11 @@
-<!-- start custom analytics snippet -->
+{% if site.google_analytics %}
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
 
-<!-- end custom analytics snippet -->
+  gtag('config', '{{ site.google_analytics }}');
+</script>
+{% endif %}