Package validation found the following error

[cdm2012]

Package validation found the following error:

• line 8, column 1 of lib/integration_test_helper.dart: flutter_test is in the dev_dependencies section of pubspec.yaml. Packages used in lib/ must be declared in the dependencies section.

    ╷
  8 │ import 'package:flutter_test/flutter_test.dart';
    │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ╵

Sorry, your package is missing a requirement and can't be published yet.
For more information, see: https://dart.dev/tools/pub/cmd/pub-lish.

pub finished with exit code 65