Add disclaimer about futures 0.1 to README.md

ebkalderon · Feb 5, 2020 · 62bd30f · 62bd30f
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diff --git a/README.md b/README.md
@@ -36,6 +36,9 @@ consists of three parts:
 * A `Server` which spawns the `LspService` and processes requests and responses
   over stdin and stdout.
 
+_NOTE: This library currently relies on `futures` 0.1 and is not async/await
+ready. Support for `std::future::Future` and async/await is tracked in #58._
+
 ## Example
 
 ```rust