allow raw elements if they include a dash

examples/web_component.rs

@@ -0,0 +1,15 @@
+
+
+use dioxus::prelude::*;
+
+fn main() {
+    dioxus_desktop::launch(app);
+}
+
+fn app(cx: Scope) -> Element {
+    cx.render(rsx! {
+        web-component {
+            "my-prop": "5%",
+        }
+    })
+}