Using more strict eslint rules

lib/helpers/cookies.js

@@ -6,7 +6,7 @@ module.exports = (
   utils.isStandardBrowserEnv() ?
 
   // Standard browser envs support document.cookie
-  (function () {
+  (function standardBrowserEnv() {
     return {
       write: function write(name, value, expires, path, domain, secure) {
         var cookie = [];
@@ -43,7 +43,7 @@ module.exports = (
   })() :
 
   // Non standard browser env (web workers, react-native) lack needed support.
-  (function () {
+  (function nonStandardBrowserEnv() {
     return {
       write: function write() {},
       read: function read() { return null; },