Fix false negatives for Rails/EnumHash cop

[pocke]

Rails/EnumHash cop has been introduced in #94. Thanks!

But the cop has two false negatives. This pull request will fix them.

with non-symbol key

This cop does not detect enum call with non-symbol key. For example:

KEY = :status
enum KEY => %i[active archived]

with multiple keys

enum allows defining multiple enums in one enum method call.

enum status: %i[active archived],
     role: %i[owner member]

But the cop is not aware of the code.

Note

The cop has not been released yet, so I did not write any changelog for the pull request.

I wait merging #95 to review this pull request. Thanks.

---

Before submitting the PR make sure the following are checked:

• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Added an entry to the Changelog if the new code introduces user-observable changes. See changelog entry format.
• The PR relates to only one subject with a clear title
  and description in grammatically correct, complete sentences.
• Run bundle exec rake default. It executes all tests and RuboCop for itself, and generates the documentation.

[pocke]

enum status: is not a bad part, so I think the cop should add an offense only to the array.

[koic]

Nice improvement ❤️

[koic]

Thanks!

[santib]

@pocke Nice improvements! Given we based the Rails/EnumHash cop in Rails/EnumUniqueness, I guess these improvements apply for that cop too. Thoughts? cc: @koic

[pocke]

@pocke Nice improvements! Given we based the Rails/EnumHash cop in Rails/EnumUniqueness, I guess these improvements apply for that cop too. Thoughts? cc: @koic

It is a good idea! Thank you.
Can you open a pull request for the cop? I'm busy this week, so I'll open it next week if I do that.