It fixes more Ruby 2.7 warnings

rspec-rails:
https://github.com/rspec/rspec-rails/blob/main/Changelog.md

rspec-core:
https://github.com/rspec/rspec-core/blob/main/Changelog.md

rspec-expectations:
https://github.com/rspec/rspec-expectations/blob/main/Changelog.md

rspec-support:
https://github.com/rspec/rspec-support/blob/main/Changelog.md

rspec-mocks:
https://github.com/rspec/rspec-mocks/blob/main/Changelog.md