a note on preferring std lib equiv

README.md

@@ -1,10 +1,15 @@
 # atty
 
+> [!WARNING]
+> This is crate is no longer maintained and users are encouraged to prefer
+> the equivalant functionality of [std.io.IsTerminal](https://doc.rust-lang.org/std/io/trait.IsTerminal.html), introduced in [Rust 1.70.0](https://blog.rust-lang.org/2023/06/01/Rust-1.70.0.html#isterminal)
+>
+> Thank you for your support!
+
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 > are you or are you not a tty?
 
-
 ## install
 
 Add the following to your `Cargo.toml`
@@ -32,7 +37,6 @@ fn main() {
 
 This library has been unit tested on both unix and windows platforms (via appveyor).
 
-
 A simple example program is provided in this repo to test various tty's. By default.
 
 It prints