update queued song (#28)

Reviewed-on: #28
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/util.rs

@@ -0,0 +1,6 @@
+pub fn path_buf_to_string(path: &std::path::Path) -> String {
+    match path.to_str() {
+        Some(val) => String::from(val),
+        None => String::new(),
+    }
+}