Make Style/RedundantParentheses aware of redundant method arg parentheses

[koic]

This PR makes Style/RedundantParentheses aware of redundant method argument parentheses.

The following is an example:

x.y.((z))

Before

$ bundle exec rubocop --only Style/RedundantParentheses -a
Inspecting 1 file
.

1 file inspected, no offenses detected

After

$ bundle exec rubocop --only Style/RedundantParentheses -a
Inspecting 1 file
C

Offenses:

example.rb:1:6: C: [Corrected] Style/RedundantParentheses: Don't use parentheses around a method call.
x.y.((z))
     ^^^

1 file inspected, 1 offense detected, 1 offense corrected

$ cat example.rb
x.y.(z)

---

Before submitting the PR make sure the following are checked:

• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• 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.
• Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
• Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.