Bump rubocop-rails from 2.15.2 to 2.18.0#1118

dependabot[bot] wants to merge 1 commit intomainrubyforgood/abalone:mainfrom

dependabot/bundler/rubocop-rails-2.18.0rubyforgood/abalone:dependabot/bundler/rubocop-rails-2.18.0Copy head branch name to clipboard