Support compile `gix-url` to wasm32-wasi

[ChanTsune]

Hi! I tried to compile gix-url to wasm32-wasi but encountered an error during compilation with this error:

error[E0425]: cannot find function `home_dir_inner` in the crate root
  --> /.cargo/registry/src/index.crates.io-6f17d22bba15001f/home-0.5.9/src/env.rs:33:16
   |
33 |         crate::home_dir_inner()
   |                ^^^^^^^^^^^^^^ not found in the crate root
   |
note: found an item that was configured out
  --> /.cargo/registry/src/index.crates.io-6f17d22bba15001f/home-0.5.9/src/lib.rs:66:14
   |
66 | use windows::home_dir_inner;
   |              ^^^^^^^^^^^^^^
note: found an item that was configured out
  --> /.cargo/registry/src/index.crates.io-6f17d22bba15001f/home-0.5.9/src/lib.rs:69:4
   |
69 | fn home_dir_inner() -> Option<PathBuf> {
   |    ^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0425`.
error: could not compile `home` (lib) due to 1 previous error

The reason for this error is that home does not support wasm. However, gix-path, which gix-url depends on, has a function gix_path::env::home_dir that provides similar functionality. So, I used gix_path::env::home_dir instead of home::home_dir and remove home from gix-url dependencies.