Use pin-project-lite instead of pin-project (#95)

src/macros.rs

@@ -9,10 +9,12 @@ macro_rules! opaque_future {
     };
 
     ($(#[$m:meta])* pub type $name:ident<$($param:ident),*> = $actual:ty;) => {
-        #[pin_project::pin_project]
-        $(#[$m])*
-        pub struct $name<$($param),*>(#[pin] pub(crate) $actual)
-        where;
+        pin_project_lite::pin_project! {
+            $(#[$m])*
+            pub struct $name<$($param),*> {
+                #[pin] pub(crate) future: $actual,
+            }
+        }
 
         impl<$($param),*> std::fmt::Debug for $name<$($param),*> {
             fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -27,7 +29,7 @@ macro_rules! opaque_future {
             type Output = <$actual as std::future::Future>::Output;
             #[inline]
             fn poll(self: std::pin::Pin<&mut Self>, cx: &mut std::task::Context<'_>) -> std::task::Poll<Self::Output> {
-                self.project().0.poll(cx)
+                self.project().future.poll(cx)
             }
         }
     };