Add Vemetric (#51)

Author: corentinmusard

prettier.config.js

@@ -0,0 +1,10 @@
+window.vmtrcq = window.vmtrcq || [];
+window.vmtrc = window.vmtrc || function () {
+    window.vmtrcq.push(Array.prototype.slice.call(arguments))
+};
+
+const script = document.createElement('script');
+script.src = 'https://cdn.vemetric.com/main.js';
+script.defer = true;
+script.setAttribute('data-token', 'rQI52fw6s6frnSOR');
+document.head.appendChild(script);