Fix typo

Replace password with Asterix and Obelix
See: http://www.topkool.com/fr/wp-content/uploads/2012/10/asterix-et-obelix-017.jpg

@appinteractive 😆

src/middleware/passwordMiddleware.js

@@ -13,7 +13,7 @@ export default {
   Query: async (resolve, root, args, context, info) => {
     const result = await resolve(root, args, context, info)
     return walkRecursive(result, ['password'], () => {
-      // replace password with asterix
+      // replace password with asterisk
       return '*****'
     })
   }