chore: main.js fix

src/main.js

-import '@babel/polyfill'
-import Vue from 'vue'
-import App from './App.vue'
-import router from './router'
-import store from './store/'
-import { VueAxios } from '@/utils/request' // axios 不建议引入到 Vue 原型链上
-
-import './core/use'
-import bootstrap from './core/bootstrap'
-import '@/permission' // permission control
-import '@/utils/filter' // global filter
-
-Vue.config.productionTip = false
-
-Vue.use(VueAxios, router)
-
-new Vue({
-  router,
-  store,
-  created () {
-    bootstrap()
-  },
-  render: h => h(App)
-}).$mount('#app')
+// ie polyfill
+import '@babel/polyfill'
+
+import Vue from 'vue'
+import App from './App.vue'
+import router from './router'
+import store from './store/'
+import { VueAxios } from './utils/request'
+
+import bootstrap from './core/bootstrap'
+import './core/use'
+import './permission' // permission control
+import './utils/filter' // global filter
+
+Vue.config.productionTip = false
+
+// mount axios Vue.$http and this.$http
+Vue.use(VueAxios)
+
+new Vue({
+  router,
+  store,
+  created () {
+    bootstrap()
+  },
+  render: h => h(App)
+}).$mount('#app')