fix(api): Expose FuturesTimerSleeper properly (#205)

Also fix name inconsistencies.

Author: tolbrino

backon/src/lib.rs

@@ -41,13 +41,13 @@
 //! environments, they are gated under their own features, which are enabled
 //! by default:
 //!
-//! |      `Sleeper`       | feature            | Environment |  Asynchronous |
-//! |----------------------|--------------------|-------------|---------------|
-//! | [`TokioSleeper`]     | tokio-sleep        | non-wasm32  |  Yes          |
-//! | [`GlooTimersSleep`]  | gloo-timers-sleep  |   wasm32    |  Yes          |
-//! | [`FutureTimerSleep`] | future-timer-sleep |wasm/non-wasm|  Yes          |
-//! | [`EmbassySleep`]     | embassy-sleep      |   no_std    |  Yes          |
-//! | [`StdSleeper`]       | std-blocking-sleep |    std      |  No           |
+//! |      `Sleeper`          | feature             | Environment |  Asynchronous |
+//! |-------------------------|---------------------|-------------|---------------|
+//! | [`TokioSleeper`]        | tokio-sleep         | non-wasm32  |  Yes          |
+//! | [`GlooTimersSleep`]     | gloo-timers-sleep   |   wasm32    |  Yes          |
+//! | [`FuturesTimerSleeper`] | futures-timer-sleep |wasm/non-wasm|  Yes          |
+//! | [`EmbassySleep`]        | embassy-sleep       |   no_std    |  Yes          |
+//! | [`StdSleeper`]          | std-blocking-sleep  |    std      |  No           |
 //!
 //! ## Custom Sleeper
 //!
@@ -227,6 +227,8 @@ pub use retry_with_context::RetryableWithContext;
 
 mod sleep;
 pub use sleep::DefaultSleeper;
+#[cfg(feature = "futures-timer-sleep")]
+pub use sleep::FuturesTimerSleeper;
 #[cfg(all(target_arch = "wasm32", feature = "gloo-timers-sleep"))]
 pub use sleep::GlooTimersSleep;
 pub use sleep::Sleeper;

backon/src/sleep.rs

@@ -84,10 +84,10 @@ impl Sleeper for TokioSleeper {
 /// It is async runtime agnostic and will also work in WASM environments.
 #[cfg(feature = "futures-timer-sleep")]
 #[derive(Clone, Copy, Debug, Default)]
-pub struct FuturesTimerSleep;
+pub struct FuturesTimerSleeper;
 
 #[cfg(feature = "futures-timer-sleep")]
-impl Sleeper for FuturesTimerSleep {
+impl Sleeper for FuturesTimerSleeper {
     type Sleep = futures_timer::Delay;
 
     fn sleep(&self, dur: Duration) -> Self::Sleep {