Update the readme with the latest versions

Author: rtyler

README.md

@@ -49,8 +49,8 @@ and **not ready for production yet**.
 Add two dependencies to your project's `Cargo.toml` file: `tide` itself, and `async-std` with the feature `attributes` enabled:
 ```toml
 # Example, use the version numbers you need
-tide = "0.8.0"
-async-std = { version = "1.5.0", features = ["attributes"] }
+tide = "0.11.0"
+async-std = { version = "1.6.0", features = ["attributes"] }
 ```
 
 ## Examples