force open with Music.app specifically

src/main.rs

···
 
             for file in files {
                 if file.file_type().is_file() {
-                    Command::new("open").arg(file.path()).output()?;
+                    Command::new("open")
+                        .args(["-a", "Music"])
+                        .arg(file.path())
+                        .output()?;
                 }
             }
             println!("Job done.");