try to fix path problems on windows (used / instead of \ )

src/library.rs

@@ -72,15 +72,19 @@ impl CargoCachePaths {
            );
            return Err((ErrorKind::CargoHomeNotDirectory, msg));
        }

        // path delimiter
        let pd = if cfg!(windows) { "\\" } else { "/" };

        // get the paths to the relevant directories
        let cargo_home = cargo_home_path;
        let bin = cargo_home.join("bin/");
        let registry = cargo_home.join("registry/");
        let registry_index = registry.join("index/");
        let reg_cache = registry.join("cache/");
        let reg_src = registry.join("src/");
        let git_repos_bare = cargo_home.join("git/db/");
        let git_checkouts = cargo_home.join("git/checkouts/");
        let bin = cargo_home.join("bin").join(pd);
        let registry = cargo_home.join("registry").join(pd);
        let registry_index = registry.join("index").join(pd);
        let reg_cache = registry.join("cache").join(pd);
        let reg_src = registry.join("src").join(pd);
        let git_repos_bare = cargo_home.join("git").join(pd).join("db").join(pd);
        let git_checkouts = cargo_home.join("git").join(pd).join("checkouts").join(pd);

        Ok(Self {
            cargo_home,