Switch from dirs crate to cargo-team maintained home crate

Cargo.toml

@@ -12,8 +12,8 @@ categories = ["os", "filesystem"]
 keywords = ["which", "which-rs", "unix", "command"]
 
 [dependencies]
-dirs = "5.0.1"
 either = "1.6.1"
+home = "0.5.5"
 regex = { version = "1.5.5", optional = true }
 rustix = { version = "0.38.10", default-features = false, features = ["fs", "std"] }
 

src/finder.rs

@@ -2,7 +2,6 @@ use crate::checker::CompositeChecker;
 use crate::error::*;
 #[cfg(windows)]
 use crate::helper::has_executable_extension;
-use dirs::home_dir;
 use either::Either;
 #[cfg(feature = "regex")]
 use regex::Regex;
@@ -249,3 +248,15 @@ fn correct_casing(mut p: PathBuf) -> PathBuf {
 fn correct_casing(p: PathBuf) -> PathBuf {
     p
 }
+
+#[cfg(any(unix, target_os = "redox", windows))]
+fn home_dir() -> Option<PathBuf> {
+    home::home_dir()
+}
+
+// This is for wasm platform (and maybe others) where home directory is not
+// defined. See: https://github.com/rust-lang/cargo/issues/12297
+#[cfg(not(any(unix, target_os = "redox", windows)))]
+fn home_dir() -> Option<PathBuf> {
+    None
+}