v3.0.0: Remove validator overwrite (#63)
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* Extract validation logic into own class
* Deprecate the custom validator
The is no need for a custom validator instance. It is bad practice for 3rd party packages to define rules this way.
* Adapt service provider, install validation rule as "extension"
Also, removed the custom resolver - the logic that is overwriting an application's validator instance.
* Add test helper
Helper is responsible for creating validator instance with desired validation rules...
* Adapt unit tests
* Remove IDE injected PHPDoc
* Fix style