fix: audio on safari (#304)

packages/pinball_audio/lib/gen/assets.gen.dart

@@ -8,14 +8,14 @@ import 'package:flutter/widgets.dart';
 class $AssetsMusicGen {
   const $AssetsMusicGen();
 
-  String get background => 'assets/music/background.ogg';
+  String get background => 'assets/music/background.mp3';
 }
 
 class $AssetsSfxGen {
   const $AssetsSfxGen();
 
-  String get google => 'assets/sfx/google.ogg';
+  String get google => 'assets/sfx/google.mp3';
-  String get plim => 'assets/sfx/plim.ogg';
+  String get plim => 'assets/sfx/plim.mp3';
 }
 
 class Assets {

packages/pinball_audio/test/src/pinball_audio_test.dart

@@ -91,11 +91,11 @@ void main() {
 
         verify(
           () => preCacheSingleAudio
-              .onCall('packages/pinball_audio/assets/sfx/google.ogg'),
+              .onCall('packages/pinball_audio/assets/sfx/google.mp3'),
         ).called(1);
         verify(
           () => preCacheSingleAudio
-              .onCall('packages/pinball_audio/assets/music/background.ogg'),
+              .onCall('packages/pinball_audio/assets/music/background.mp3'),
         ).called(1);
       });
     });