mention futures 0.3.0 and futures-intrusive crate

Author: nikomatsakis

posts/2019-10-30-Async-await-stable.md

@@ -40,11 +40,12 @@ new syntax:
 * using [wasm-bindgen-futures], you can even bridge Rust Futures with
   [JavaScript promises];
 * the [hyper library][hyper] has [migrated][hyper#1805] to adopt standard Rust futures;
-* the 0.3.0 version of the [futures-rs library][futures] will support
-  async-await and will be released at or around the time async-await hits stable
-  (you can use the [0.3.0-alpha][] releases now);
+* the newly released 0.3.0 version of the [futures-rs library][futures] includes support
+  async-await;
 * finally, async-await support is starting to become available in higher-level
-  [web frameworks][wf] as well.
+  [web frameworks][wf] as well, as well as other interesting applications such
+  as the [`futures_intrusive`](https://docs.rs/futures-intrusive/0.2.0/futures_intrusive/)
+  crate.
 
 [futures]: https://crates.io/crates/futures-preview
 [tokio]: https://tokio.rs/