Style/Documentation accept constant visibility declaration as namespace

[AdrienSdy]

When declare the visibility of a constant (class and module include), the namespace object get an offense to document it.

module Namespace
  class Private
  end

  private_constant :Private
end

---

Expected behavior

Don't get an offense on the Namespace module. by considering constant visibility declaration as constant declaration.

Actual behavior

Get an offense on the Namespace module.

Steps to reproduce the problem

• Create a file with the code above
• Run Rubocop on it

RuboCop version

0.71.0 (using Parser 2.6.3.0, running on ruby 2.4.5 x86_64-darwin18)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution and understanding!

[AdrienSdy]

This issue is pending reviews on the pull request.