Upgrade XO and add Prettier

.prettierrc.yml

@@ -0,0 +1,2 @@
+trailingComma: es5
+singleQuote: false

aeks/aeks.user.js

@@ -23,42 +23,40 @@
 // @grant       none
 // ==/UserScript==
 
-(function () {
+(function() {
   "use strict";
 
-  var userscript = function ($) {
+  const userscript = function($) {
     function log(message) {
       if (console && console.log) {
         console.log(message);
       }
     }
 
-    var userLink = $(".my-profile, .profile-me").attr("href");
+    const userLink = $(".my-profile, .profile-me").attr("href");
 
     // AEKS has already ran on this site, or the user doesn't have an account here.
     if (!userLink || localStorage.aeksFinished) {
-      log("AEKS cancelled: User has no account or AEKS already finished on this site.");
+      log(
+        "AEKS cancelled: User has no account or AEKS already finished on this site."
+      );
       return;
     }
 
-    var params = [
+    const params = [
       {name: "fkey", value: localStorage["se:fkey"].split(",")[0]},
-      {name: "key", value: "85"},     // 85 is the id for the keyboard shortcuts setting.
+      {name: "key", value: "85"}, // 85 is the id for the keyboard shortcuts setting.
       {name: "value", value: "true"}, // Enable that setting
-      {name: "forUserId", value: userLink.match(/\d+/)[0]}
+      {name: "forUserId", value: userLink.match(/\d+/)[0]},
     ];
 
-    $.post(
-      "/users/save-preference",
-      params,
-      function () {
-        localStorage.aeksFinished = true;
-        log("AEKS finished on this site.");
-      }
-    );
+    $.post("/users/save-preference", params, () => {
+      localStorage.aeksFinished = true;
+      log("AEKS finished on this site.");
+    });
   };
 
-  var aeksScript = document.createElement("script");
+  const aeksScript = document.createElement("script");
   aeksScript.type = "application/javascript";
   aeksScript.text = "(" + userscript + ")(jQuery);";
   document.body.appendChild(aeksScript);