Replace atty with std::io::IsTerminal (#973)

Co-authored-by: Gal Schlezinger <gal@spitfire.co.il>

Cargo.lock

@@ -592,7 +592,6 @@ name = "fnm"
 version = "1.33.1"
 dependencies = [
  "anyhow",
- "atty",
  "chrono",
  "clap",
  "clap_complete",

Cargo.toml

@@ -23,7 +23,6 @@ tempfile = "3.6.0"
 indoc = "2.0.1"
 log = "0.4.19"
 env_logger = "0.10.0"
-atty = "0.2.14"
 encoding_rs_io = "0.1.7"
 reqwest = { version = "0.11.18", features = ["blocking", "json", "rustls-tls", "rustls-tls-native-roots", "brotli"], default-features = false }
 url = "2.4.0"

src/commands/use.rs

@@ -159,9 +159,9 @@ fn replace_symlink(from: &std::path::Path, to: &std::path::Path) -> std::io::Res
 }
 
 fn should_install_interactively(requested_version: &UserVersion) -> bool {
-    use std::io::Write;
+    use std::io::{IsTerminal, Write};
 
-    if !(atty::is(atty::Stream::Stdout) && atty::is(atty::Stream::Stdin)) {
+    if !(std::io::stdout().is_terminal() && std::io::stdin().is_terminal()) {
         return false;
     }