fix: scopes not dropping their hooks

examples/drops.rs

@@ -0,0 +1,36 @@
+use dioxus::prelude::*;
+
+fn main() {
+    dioxus_desktop::launch(app);
+}
+
+fn app(cx: Scope) -> Element {
+    let count = if cx.generation() % 2 == 0 { 10 } else { 0 };
+
+    println!("Generation: {}", cx.generation());
+
+    if cx.generation() < 10 {
+        cx.needs_update();
+    }
+
+    render! {
+        (0..count).map(|_| rsx!{
+            Comp {}
+        })
+    }
+}
+
+fn Comp(cx: Scope) -> Element {
+    cx.use_hook(|| Drops);
+    render! {
+        div{}
+    }
+}
+
+struct Drops;
+
+impl Drop for Drops {
+    fn drop(&mut self) {
+        println!("Dropped!");
+    }
+}