Replace dependency on dirs with home

The `dirs` crate recently started depending on the `options-ext` crate
which uses copyleft license (MPL). This (unnecessary) dependency causes
licensing issues for various users by possibly poisoning the dependency
tree of their projects[1].

This change replaces the `dirs` crate with `home`. The `home` crate is
maintained by the cargo team and offers the same functionality.

As a bonus, this change also results in a slightly smaller dependency
tree.

[1]:
- artichoke/artichoke#2564
- pyrossh/rust-embed#231
- juhaku/utoipa#834
- harryfei/which-rs#78

pgrx-pg-config/Cargo.toml

@@ -23,7 +23,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-dirs = "5.0.1"
+home = "0.5.9"
 eyre = "0.6.8"
 pathsearch = "0.2.0"
 owo-colors = "3.5.0"

pgrx-pg-config/src/lib.rs

@@ -633,7 +633,7 @@ impl Pgrx {
     pub fn home() -> Result<PathBuf, PgrxHomeError> {
         let pgrx_home = std::env::var("PGRX_HOME").map_or_else(
             |_| {
-                let mut pgrx_home = match dirs::home_dir() {
+                let mut pgrx_home = match home::home_dir() {
                     Some(home) => home,
                     None => return Err(PgrxHomeError::NoHomeDirectory),
                 };