feat: amazingly awesome error handling

docs/main-concepts/06-subscription-api.md

@@ -3,7 +3,7 @@
 Yew subscriptions are used to schedule update for components into the future. The `Context` object can create subscriptions:
 
 ```rust
-fn Component(cx: Component<()>) -> VNode {
+fn Component(cx: Component<()>) -> DomTree {
     let update = cx.schedule();
 
     // Now, when the subscription is called, the component will be re-evaluted