Fix set shadows on unsupported platforms

Author: elibroftw

package.json

@@ -1,6 +1,6 @@
 {
   "name": "r2-t2",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "private": true,
   "dependencies": {
     "@emotion/react": "^11.10.4",

src-tauri/src/main.rs

@@ -201,7 +201,7 @@ fn main() {
     .setup(|app| {
         app.manage(Mutex::new(TrayState::NotPlaying));
         if let Some(window) = app.get_window("main") {
-          set_shadow(&window, true).expect("Unsupported platform!");
+          set_shadow(&window, true).ok(); // don't care if platform is unsupported
         }
         Ok(())
     })