migrate to Vue3

src/main.ts

@@ -1,18 +1,16 @@
-import Vue from 'vue'
+import { createApp } from 'vue'
 import App from './App.vue'
-import './registerServiceWorker'
 import router from './router'
-import store from './store'
-import VueCompositionAPI from '@vue/composition-api'
+import { createPinia } from 'pinia'
+import piniaPluginPersistedstate from 'pinia-plugin-persistedstate'
 import i18n from './i18n'
 
-Vue.use(VueCompositionAPI)
+const app = createApp(App)
+const pinia = createPinia()
+pinia.use(piniaPluginPersistedstate)
 
-Vue.config.productionTip = false
+app.use(pinia)
+app.use(router)
+app.use(i18n)
 
-new Vue({
-  router,
-  store,
-  i18n,
-  render: (h) => h(App)
-}).$mount('#app')
+app.mount('#app')