fix: router scrollBehavior to hash(vuejs#298)

Author: meteorlxy

lib/app/app.js

@@ -57,7 +57,7 @@ export function createApp () {
       if (saved) {
         return saved
       } else if (to.hash) {
-        return false
+        return { selector: to.hash }
       } else {
         return { x: 0, y: 0 }
       }