f missing import

Author: TheBlueMatt

lightning/src/util/wakers.rs

@@ -207,6 +207,7 @@ mod tests {
 	use core::sync::atomic::{AtomicBool, Ordering};
 	use core::future::Future as FutureTrait;
 	use core::task::{Context, Poll, RawWaker, RawWakerVTable, Waker};
+	use core::pin::Pin;
 
 	#[cfg(feature = "std")]
 	#[test]