Upgrade mockito to 5.5.1

Author: imaNNeo

pubspec.yaml

@@ -24,7 +24,7 @@ dev_dependencies:
   build_runner: ^2.8.0
   flutter_test:
     sdk: flutter
-  mockito: ^5.4.6
+  mockito: ^5.5.1
   very_good_analysis: ^7.0.0
 
 screenshots: