fix: allow passing listeners to the <Navigator> frame.

Author: rigor789

Diff for: components/Navigator.js

@@ -10,7 +10,11 @@ export default {
     return h(
       'frame',
       {
-        on: {loaded: this.onFrameLoaded},
+        on: Object.assign(
+          {},
+          this.$listeners,
+          {loaded: this.onFrameLoaded}
+        ),
       },
       [this.slotContent]
     )

Diff for: index.js

@@ -49,10 +49,10 @@ export default function install(Vue, {routes}) {
           return false
         }
 
-        this.$navigateTo(matchedRoute.component, options)
+        return this.$navigateTo(matchedRoute.component, options)
       },
       back(...args) {
-        this.$navigateBack.call(this, args)
+        return this.$navigateBack.call(this, args)
       }
     },
   })