Revisit Route Triggers Too Early (Challenge)

# Introduction

In this challenge, we will be addressing a bug in the vue-router v2.5.2 code version. The problem occurs when the `beforeRouteUpdate` `next()` triggers too early during the re-visiting of a route in the "out-in" transition. The goal is to fix this issue by modifying the source code and ensuring the correct triggering of `beforeRouteUpdate` in the given scenario.