Fix mobile menu in IE11

Remove trailing comma in functions (IE11)

package.json

@@ -27,6 +27,13 @@
         2,
         "tab"
       ],
+      "comma-dangle": ["error", {
+        "arrays": "always-multiline",
+        "objects": "always-multiline",
+        "imports": "always-multiline",
+        "exports": "always-multiline",
+        "functions": "ignore"
+      }],
       "no-tabs": 0
     }
   },

static/js/menu.js

@@ -6,7 +6,7 @@ function toggleMenu() {
 	this.classList.toggle('main-nav__btn--active');
 	this.setAttribute(
 		'aria-expanded',
-		this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true',
+		this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true'
 	);
 }