feat: add option to disable plugin warnings

[AlexDubok]

An option that prevents emitting conflicting order warnings

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

On a large project with a lot of internal dependencies, there may be a lot of conflicting order warnings.
Sometimes it is OK, because conflicting files may not contain intersecting selectors.
Disabling warnings in webpack stats config will not turn off these, so it would be great to have an option to disable plugin's warnings.

[jsf-clabot]

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[alexander-akait]

You should use warningsFilter (https://webpack.js.org/configuration/stats/) no need option for this

[AlexDubok]

Thanks, didn't know there is an option for that. Closing the PR :)