Enable cop for pending rubocop-performance

[ydah]

This PR enable cop for pending rubocop-performance and correct some offense.

❯ bundle exec rubocop
Inspecting 44 files
...................C.....................C..

Offenses:

lib/rubocop/cop/capybara/specific_finders.rb:109:22: C: [Correctable] Performance/MapCompact: Use filter_map instead.
          attrs.each.map do |key, value| ...
                     ^^^^^^^^^^^^^^^^^^^
spec/spec_helper.rb:17:9: C: Performance/MethodObjectAsBlock: Use block explicitly instead of block-passing a method object.
  .each(&method(:require))
        ^^^^^^^^^^^^^^^^^

44 files inspected, 2 offenses detected, 1 offense autocorrectable

---

Before submitting the PR make sure the following are checked:

• Feature branch is up-to-date with main (if not - rebase it).
• Squashed related commits together.
• [-] Added tests.
• [-] Updated documentation.
• [-] Added an entry to the CHANGELOG.md if the new code introduces user-observable changes.
• The build (bundle exec rake) passes (be sure to run this locally, since it may produce updated documentation that you will need to commit).

[pirj]

Thanks!

What it would take to enable all of the perf cops? We could pin the gem version in the gemfile like we do for rubocop?