chore: fix invalid type annotation in typings test (vuejs#1713)

Author: ktsn

types/test/index.ts

@@ -163,7 +163,7 @@ router.go(-1);
 router.back();
 router.forward();
 
-const Components: ComponentOptions<Vue> | typeof Vue = router.getMatchedComponents();
+const Components: (ComponentOptions<Vue> | typeof Vue)[] = router.getMatchedComponents();
 
 const vm = new Vue({
   router,