style(cli): add eslint no undefined for single line only

Author: knagaitsev

lib/utils/createConfig.js

@@ -1,9 +1,5 @@
 'use strict';
 
-/* eslint-disable
-  no-undefined
-*/
-
 const defaultTo = require('./defaultTo');
 
 function createConfig(config, argv, { port }) {
@@ -148,6 +144,7 @@ function createConfig(config, argv, { port }) {
     options.openPage = argv.openPage;
   }
 
+  // eslint-disable-next-line no-undefined
   if (argv.open !== undefined) {
     options.open = argv.open;
   }