Replaced Google Analytics ID with up to date Google analytics code

Author: lucafrance

_config.yml

@@ -9,5 +9,3 @@ exclude:
 
 title: Luca Franceschini
 show_downloads: false
-google_analytics: G-30MFXQLZ42
-  

_includes/head-custom-google-analytics.html

@@ -0,0 +1,9 @@
+<!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-30MFXQLZ42"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-30MFXQLZ42');
+</script>

_includes/head-custom.html

@@ -0,0 +1,9 @@
+<!-- start custom head snippets, customize with your own _includes/head-custom.html file -->
+
+<!-- Setup Google Analytics -->
+{% include head-custom-google-analytics.html %}
+
+<!-- You can set your favicon here -->
+<!-- link rel="shortcut icon" type="image/x-icon" href="{{ '/favicon.ico' | relative_url }}" -->
+
+<!-- end custom head snippets -->