Fix crate normalize-path (#508)

* Impl new function `NormalizePath::is_normalized`
* Always normalize and ret `PathBuf` in `NormalizePath::normalize`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

crates/binstalk/src/bins.rs

@@ -113,11 +113,11 @@ impl BinFile {
 
             if !is_valid_path(&path_normalized) {
                 return Err(BinstallError::InvalidSourceFilePath {
-                    path: path_normalized.into_owned(),
+                    path: path_normalized,
                 });
             }
 
-            data.bin_path.join(path_normalized.as_ref())
+            data.bin_path.join(&path_normalized)
         };
 
         // Destination at install dir + base-name{.extension}