😒 chore(dev-deps): Upgrade xo.

Author: make-github-pseudonymous-again

doc/scripts/header.js

@@ -7,7 +7,7 @@ const domReady = function (callback) {
 	}
 };
 
-domReady(function () {
+domReady(() => {
 	const projectname = document.createElement('a');
 	projectname.classList.add('project-name');
 	projectname.text = 'aureooms/js-knapsack';
@@ -24,7 +24,7 @@ domReady(function () {
 	const input = document.querySelector('.search-input');
 
 	// Active search box when focus on searchBox.
-	input.addEventListener('focus', function () {
+	input.addEventListener('focus', () => {
 		searchBox.classList.add('active');
 	});
 });

package.json

@@ -99,7 +99,7 @@
     "nyc": "15.1.0",
     "power-assert": "1.6.1",
     "regenerator-runtime": "0.13.7",
-    "xo": "0.35.0"
+    "xo": "0.36.1"
   },
   "files": [
     "lib"