refactor: updated dependencies

Had to update the mock dependency as @GenerateNiceMock wasn't working with the previous version

pubspec.yaml

@@ -16,15 +16,15 @@ dependencies:
   yaml: ^3.1.0
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.13.0 <3.0.0'
 
 dev_dependencies:
   # Needed by build_version
   build_runner: ^2.2.0
   # allows us to get version number from pubspec yaml which we can pass to Sentry
   # https://pub.dev/packages/build_version
   build_version: ^2.1.1
-  json_serializable: ^6.2.0
-  mockito: ^5.2.0
-  test: ^1.21.1
-  test_descriptor: ^2.0.0
+  json_serializable: ^6.5.4
+  mockito: ^5.3.2
+  test: ^1.22.0
+  test_descriptor: ^2.0.1

test/macos/macos_icon_generator_test.dart

@@ -11,13 +11,15 @@ import 'package:test/test.dart';
 import 'package:test_descriptor/test_descriptor.dart' as d;
 
 import '../templates.dart' as templates;
-import 'macos_icon_generator_test.mocks.dart';
 
 @GenerateNiceMocks([
   MockSpec<FlutterLauncherIconsConfig>(),
   MockSpec<MacOSConfig>(),
   MockSpec<FLILogger>(),
 ])
+
+import 'macos_icon_generator_test.mocks.dart';
+
 void main() {
   group('MacOSIconGenerator', () {
     late IconGeneratorContext context;