Add Prettier

packages/insomnia-httpsnippet/test/fixtures/output/javascript/xhr/https.js

@@ -3,12 +3,12 @@ var data = null;
 var xhr = new XMLHttpRequest();
 xhr.withCredentials = true;
 
-xhr.addEventListener("readystatechange", function () {
+xhr.addEventListener('readystatechange', function() {
   if (this.readyState === this.DONE) {
     console.log(this.responseText);
   }
 });
 
-xhr.open("GET", "https://mockbin.com/har");
+xhr.open('GET', 'https://mockbin.com/har');
 
 xhr.send(data);