refactor: more explicit ssr external control via options

Author: yyx990803

Diff for: packages/plugin-vue/src/index.ts

@@ -72,11 +72,14 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
       return handleHotUpdate(ctx)
     },
 
-    config(config) {
+    config() {
       return {
         define: {
           __VUE_OPTIONS_API__: true,
           __VUE_PROD_DEVTOOLS__: false
+        },
+        ssr: {
+          external: ['vue', '@vue/server-renderer']
         }
       }
     },