Update Inertia import to use named exports from 0.1

Author: michaeldyrynda

src/inertiajs-stubs/resources/js/app.js

@@ -1,14 +1,14 @@
 require('./bootstrap')
 
-import Inertia from 'inertia-vue'
+import { InertiaApp } from '@inertiajs/inertia-vue'
 import Vue from 'vue'
 
-Vue.use(Inertia)
+Vue.use(InertiaApp)
 
 let app = document.getElementById('app')
 
 new Vue({
-  render: h => h(Inertia, {
+  render: h => h(InertiaApp, {
     props: {
       initialPage: JSON.parse(app.dataset.page),
       resolveComponent: (name) => {