build: stark-core - circular dependencies detected by Rollup

[christophercr]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[X] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#got-a-question-or-problem

Current behavior

Rollup displays some warnings due to circular dependencies while building the package:

(!) Circular dependency: dist\packages\stark-core\esm5\src\configuration\entities\application.js -> dist\packages\stark-core\esm5\src\configuration\entities\application\app-config.entity.js -> dist\packages\stark-core\esm5\src\util.js -> dist\packages\stark-core\esm5\src\util\configuration.util.js -> dist\packages\stark-core\esm5\src\configuration\entities\application.js
(!) Circular dependency: dist\packages\stark-core\esm5\src\common.js -> dist\packages\stark-core\esm5\src\common\routes.js -> dist\packages\stark-core\esm5\src\common\routes\routes.js -> dist\packages\stark-core\esm5\src\modules\routing\services.js -> dist\packages\stark-core\esm5\src\modules\routing\services\routing.service.js -> dist\packages\stark-core\esm5\src\modules\logging\services.js -> dist\packages\stark-core\esm5\src\modules\logging\services\logging.service.js -> dist\packages\stark-core\esm5\src\modules\logging\entities.js -> dist\packages\stark-core\esm5\src\modules\logging\entities\logging.entity.js -> dist\packages\stark-core\esm5\src\modules\logging\entities\log-message.entity.js -> dist\packages\stark-core\esm5\src\common.js
(!) Circular dependency: dist\packages\stark-core\esm5\src\modules\logging\reducers.js -> dist\packages\stark-core\esm5\src\modules\logging\reducers\index.js -> dist\packages\stark-core\esm5\src\modules\logging\reducers.js
(!) Circular dependency: dist\packages\stark-core\esm5\src\modules\session\reducers.js -> dist\packages\stark-core\esm5\src\modules\session\reducers\index.js -> dist\packages\stark-core\esm5\src\modules\session\reducers.js
(!) Circular dependency: dist\packages\stark-core\esm5\src\modules\settings\reducers.js -> dist\packages\stark-core\esm5\src\modules\settings\reducers\index.js -> dist\packages\stark-core\esm5\src\modules\settings\reducers.js

Apart from the circular dependency already known due to the validator implementation:

(!) Circular dependency: dist\packages\stark-core\esm5\src\validation\validator.js -> dist\packages\stark-core\esm5\src\validation\validators.js -> dist\packages\stark-core\esm5\src\validation\validators\array-size-range.js -> dist\packages\stark-core\esm5\src\validation\validators\array-size-range\array-size-range.validator.fn.js -> dist\packages\stark-core\esm5\src\validation\validator.js

Expected behavior

No circular dependencies except the known circular dependency of the validator implementation.

Minimal reproduction of the problem with instructions

Run npm run build:stark-core -- --trace to see the full log.

What is the motivation / use case for changing the behavior?

Clean, consistent and stable code.