Depend on futures-util instead of futures

tests/type_safety/mod.rs

@@ -1,6 +1,6 @@
 // Type safety tests for TaskHandle
 use crate::common::task_fn;
-use futures::FutureExt;
+
 // These tests verify dagx's compile-time type safety guarantees.
 // Tests cover both runtime behavior (wrong types return None) and
 // compile-time checking (type mismatches fail to compile).
@@ -16,7 +16,7 @@ async fn test_get_with_wrong_type_returns_none() {
     let int_task = dag.add_task(task_fn::<(), _, _>(|_: ()| 42i32));
 
     // Run DAG
-    dag.run(|fut| tokio::spawn(fut).map(Result::unwrap))
+    dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() })
         .await
         .unwrap();
 
@@ -37,7 +37,7 @@ async fn test_handle_preserves_type() {
     let string_task = dag.add_task(task_fn::<(), _, _>(|_: ()| "hello".to_string()));
     let int_task = dag.add_task(task_fn::<(), _, _>(|_: ()| 42i32));
 
-    dag.run(|fut| tokio::spawn(fut).map(Result::unwrap))
+    dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() })
         .await
         .unwrap();
 
@@ -63,7 +63,7 @@ async fn test_type_safety_handle_reuse() {
         .add_task(task_fn::<i32, _, _>(|&x: &i32| x * 3))
         .depends_on(source);
 
-    dag.run(|fut| tokio::spawn(fut).map(Result::unwrap))
+    dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() })
         .await
         .unwrap();