Make `util::async_poll` public

diff --git a/lightning/src/util/async_poll.rs b/lightning/src/util/async_poll.rs
index 7c070f3..3edfd52 100644
--- a/lightning/src/util/async_poll.rs
+++ b/lightning/src/util/async_poll.rs
@@ -92,25 +92,29 @@ pub(crate) fn dummy_waker() -> Waker {
 	unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &DUMMY_WAKER_VTABLE)) }
 }
 
-/// A type alias for a future that returns a result of type T.
 #[cfg(feature = "std")]
+/// A type alias for a future that returns a result of type T.
 pub type AsyncResult<'a, T> = Pin<Box<dyn Future<Output = Result<T, ()>> + 'a + Send>>;
 #[cfg(not(feature = "std"))]
+/// A type alias for a future that returns a result of type T.
 pub type AsyncResult<'a, T> = Pin<Box<dyn Future<Output = Result<T, ()>> + 'a>>;
 
-// Marker trait to optionally implement `Sync` under std.
+/// Marker trait to optionally implement `Sync` under std.
 #[cfg(feature = "std")]
 pub use core::marker::Sync as MaybeSync;
 
 #[cfg(not(feature = "std"))]
+/// Marker trait to optionally implement `Sync` under std.
 pub trait MaybeSync {}
 #[cfg(not(feature = "std"))]
 impl<T> MaybeSync for T where T: ?Sized {}
 
-// Marker trait to optionally implement `Send` under std.
+/// Marker trait to optionally implement `Send` under std.
 #[cfg(feature = "std")]
 pub use core::marker::Send as MaybeSend;
+
 #[cfg(not(feature = "std"))]
+/// Marker trait to optionally implement `Send` under std.
 pub trait MaybeSend {}
 #[cfg(not(feature = "std"))]
 impl<T> MaybeSend for T where T: ?Sized {}
diff --git a/lightning/src/util/mod.rs b/lightning/src/util/mod.rs
index 968f822..dcbea90 100644
--- a/lightning/src/util/mod.rs
+++ b/lightning/src/util/mod.rs
@@ -20,6 +20,7 @@ pub mod mut_global;
 
 pub mod anchor_channel_reserves;
 
+pub mod async_poll;
 #[cfg(fuzzing)]
 pub mod base32;
 #[cfg(not(fuzzing))]
@@ -33,7 +34,6 @@ pub mod ser;
 pub mod sweep;
 pub mod wakers;
 
-pub(crate) mod async_poll;
 pub(crate) mod atomic_counter;
 pub(crate) mod byte_utils;
 pub mod hash_tables;