examples: upgrade to new version of dioxus core.

also add the inline_props macro

examples/hello_world.rs

@@ -1,10 +1,10 @@
 use dioxus::prelude::*;
 
 fn main() {
-    dioxus::desktop::launch(App);
+    dioxus::desktop::launch(app);
 }
 
-fn App((cx, props): ScopeState<()>) -> Element {
+fn app(cx: Scope<()>) -> Element {
     cx.render(rsx! (
         div { "Hello, world!" }
     ))