fix: call afterHooks later (vuejs#3250)

Move afterHooks in to confirmTransition so that they will be called
even in abstract routing mode. Note that with this patch, hooks
attached via router.onReady will now fire *before* router.afterEach but
the the docs do not describe a specific execution order of these hooks.

Author: sirlancelot

src/history/base.js

@@ -91,13 +91,9 @@ export class History {
     this.confirmTransition(
       route,
       () => {
-        const prev = this.current
         this.updateRoute(route)
         onComplete && onComplete(route)
         this.ensureURL()
-        this.router.afterHooks.forEach(hook => {
-          hook && hook(route, prev)
-        })
 
         // fire ready cbs once
         if (!this.ready) {
@@ -233,6 +229,10 @@ export class History {
             })
           })
         }
+
+        this.router.afterHooks.forEach(hook => {
+          hook && hook(route, current)
+        })
       })
     })
   }