fix(async_flag): reexport name (#12)

* fix(async_flag): reexport name

* docs: add "Async Flag" to README

Author: Berrysoft

README.md

@@ -15,3 +15,4 @@ All of the following primitives are provided in both sync and unsync versions:
 - BiLock
 - Flag (specialized `AtomicBool`)
 - Event (`event-listener` and `local-event`)
+- Async Flag

src/lib.rs

@@ -66,7 +66,7 @@ pub mod sync {
 
     #[doc(inline)]
     #[cfg(feature = "async_flag")]
-    pub use crate::async_flag::sync as notify;
+    pub use crate::async_flag::sync as async_flag;
     #[doc(inline)]
     #[cfg(feature = "bilock")]
     pub use crate::bilock::sync as bilock;
@@ -95,7 +95,7 @@ pub mod unsync {
 
     #[doc(inline)]
     #[cfg(feature = "async_flag")]
-    pub use crate::async_flag::unsync as notify;
+    pub use crate::async_flag::unsync as async_flag;
     #[doc(inline)]
     #[cfg(feature = "bilock")]
     pub use crate::bilock::unsync as bilock;