fix: with-feathers nuxt.build is not a function

examples/with-feathers/src/middleware/nuxt.js

@@ -1,22 +1,23 @@
-const resolve = require('path').resolve;
+const resolve = require('path').resolve
-const Nuxt = require('nuxt');
+const { Nuxt, Builder } = require('nuxt')
 
 // Setup nuxt.js
-let config = {};
+let config = {}
 try {
-  config = require('../../nuxt.config.js');
+  config = require('../../nuxt.config.js')
 } catch (e) {}
-config.rootDir = resolve(__dirname, '..', '..');
+config.rootDir = resolve(__dirname, '..', '..')
-config.dev = process.env.NODE_ENV !== 'production';
+config.dev = process.env.NODE_ENV !== 'production'
-const nuxt = new Nuxt(config);
+
+const nuxt = new Nuxt(config)
 if (config.dev) {
-  nuxt.build().then(() => {
+  const builder = new Builder(nuxt)
-    process.emit('nuxt:build:done');
+  builder.build()
-  });
 } else {
-  process.nextTick(() => process.emit('nuxt:build:done'));
+  process.nextTick(() => process.emit('nuxt:build:done'))
 }
+
 // Add nuxt.js middleware
 module.exports = function (req, res) {
-  nuxt.render(req, res);
+  nuxt.render(req, res)
-};
+}