Update src/lib.rs

Author: yoshuawuyts

src/lib.rs

@@ -226,7 +226,7 @@
 //!
 //! ```toml
 //! [dependencies.async-std]
-//! version = "1.0.0"
+//! version = "1.5.0"
 //! default-features = false
 //! features = ["alloc"]
 //! ```