fix: nuxt example

Author: hiro08gh

example/nuxt/pages/index.vue

@@ -10,9 +10,7 @@
 </template>
 
 <script>
-const { createClient } = require('../plugins/microcms.js');
-
-const client = createClient();
+const { client } = require('../plugins/microcms.js');
 
 export default {
   async asyncData() {

example/nuxt/plugins/microcms.js

@@ -1,12 +1,10 @@
 const { createClient } = require('microcms-js-sdk');
 
 const config = {
-  serviceDomain: '',
-  apiKey: '',
+  serviceDomain: 'service-domain',
+  apiKey: 'api-key',
 };
 
 module.exports = {
-  createClient() {
-    return createClient(config);
-  },
+  client: createClient(config),
 };