fix(bootstraper): invalid place to dispatch onCompleted

lib/markettakers.dart

@@ -7,13 +7,14 @@ export 'package:markettakers/src/bootstrapper.dart'
 
 final talker = Talker();
 
-final commonTheme = ThemeData(
+final ThemeData commonTheme = ThemeData(
   colorScheme: ColorScheme.fromSeed(
     seedColor: Colors.deepPurple,
     brightness: Brightness.dark,
-  ).copyWith(secondary: Colors.deepPurpleAccent),
+    secondary: Colors.deepPurpleAccent,
+  ),
 );
 
-void init() async {
+Future<void> init() async {
   await RiveNative.init();
 }