fix: rc11 backward compability

Author: Pooya Parsa

lib/templates/auth.plugin.js

@@ -8,10 +8,8 @@ export default async function (context, inject) {
   })
 
   // Backward compability for Nuxt <= RC.11
-  if (!context.store.app) {
-    context.store.app = {
-      context
-    }
+  if (!context.store.app.context) {
+    context.store.app.context = context
   }
 
   // Fetch initial state