fix: Replace atty with is_terminal

Cargo.toml

@@ -39,7 +39,7 @@ pre-release-replacements = [
 [features]
 default = ["auto-color", "humantime", "regex"]
 color = ["dep:termcolor"]
-auto-color = ["dep:atty", "color"]
+auto-color = ["dep:is-terminal", "color"]
 humantime = ["dep:humantime"]
 regex = ["dep:regex"]
 
@@ -48,7 +48,7 @@ log = { version = "0.4.8", features = ["std"] }
 regex = { version = "1.0.3", optional = true, default-features=false, features=["std", "perf"] }
 termcolor = { version = "1.1.1", optional = true }
 humantime = { version = "2.0.0", optional = true }
-atty = { version = "0.2.5", optional = true }
+is-terminal = { version = "0.4.0", optional = true }
 
 [[test]]
 name = "regexp_filter"

src/fmt/writer/atty.rs

@@ -9,12 +9,14 @@ from being printed.
 
 #[cfg(feature = "auto-color")]
 mod imp {
+    use is_terminal::IsTerminal;
+
     pub(in crate::fmt) fn is_stdout() -> bool {
-        atty::is(atty::Stream::Stdout)
+        std::io::stdout().is_terminal()
     }
 
     pub(in crate::fmt) fn is_stderr() -> bool {
-        atty::is(atty::Stream::Stderr)
+        std::io::stderr().is_terminal()
     }
 }