Release RuboCop Rails 2.15.0 · rubocop/rubocop-rails

#325: Add new Rails/DotSeparatedKeys cop. (@fatkodima)
#704: Add new Rails/StripHeredoc cop. (@koic)
#691: Add new Rails/ToFormattedS cop. (@koic)
#588: Add new Rails/RootPublicPath cop. (@leoarnold)
#702: Make keys method aware of Rails/DeprecatedActiveModelErrorsMethods cop. (@koic)
#688: Support autocorrection for Rails/DeprecatedActiveModelErrorsMethods. (@koic)

#696: Fix a false negative for Rails/TransactionExitStatement when return is used in rescue. (@koic)
#700: Fix a false positive for Rails/FilePath when a list of paths separated by colon including Rails.root. (@tk0miya)
#680: Fix a false positive for Rails/ReversibleMigrationMethodDefinition when using an inner class. (@koic)
#692: Fix an error for Rails/UnusedIgnoredColumns when using no tables db/schema.rb. (@koic)
#707: Fix an error when a variable is passed to has_many or has_one with double splat. (@nobuyo)
#695: Fixes a false negative where the in_rescue? check would bypass situations where the return was inside a transaction but outside of a rescue. (@dorkrawk)
#703: Fix not autocorrected for Rails/DuplicateAssociation. (@ydah)
#708: Recover Ruby 2.2 code analysis using TargetRubyVersion: 2.2. (@koic)

#697: (Compatibility) Drop Ruby 2.5 support. (@koic)
#705: Add mailers to default filter/action callbacks cops. (@ojab)
#710: Rails/TransactionExitStatement - Inspect ActiveRecord::Locking::Pessimistic#with_lock too, as #with_lock opens a transaction. (@FunnyHector)

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