add plausible.io analytics

Author: ewdurbin

templates/base.html

@@ -13,6 +13,8 @@
       gtag('js', new Date());
       gtag('config', 'G-TF35YF9CVH');
     </script>
+    <!-- Plausible.io analytics -->
+    <script defer data-domain="python.org" src="https://plausible.io/js/script.js"></script>
 
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">