update wit-bindgen and simplify async_borrowing_callee test

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

Author: dicej

Cargo.lock

@@ -7,7 +7,7 @@ mod bindings {
                 "local:local/borrowing#foo",
                 "local:local/run-bool#run"
             ]
-        }
+        },
     });
 
     use super::Component;
@@ -19,23 +19,20 @@ use {
         exports::local::local::{borrowing::Guest as Borrowing, run_bool::Guest as RunBool},
         local::local::borrowing_types::X,
     },
-    futures::future,
-    std::future::Future,
     wit_bindgen_rt::async_support,
 };
 
 struct Component;
 
 impl Borrowing for Component {
-    fn foo(x: &X, misbehave: bool) -> impl Future<Output = ()> + 'static {
+    async fn foo(x: &X, misbehave: bool) {
         let handle = x.handle();
         async_support::spawn(async move {
             if misbehave {
                 unsafe { X::from_handle(handle) }.foo();
             }
         });
         x.foo();
-        future::ready(())
     }
 }