Set rubocop TargetRubyVersion: 2.3

.rubocop.yml

@@ -15,7 +15,7 @@ AllCops:
     - spec/dummy_app/db/schema.rb # Generated, out of our control
 
   # Set to lowest supported version
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.3
 
 Layout/AlignParameters:
   EnforcedStyle: with_fixed_indentation

lib/paper_trail.rb

@@ -156,7 +156,7 @@ module PaperTrail
 
     # @api public
     def transaction?
-      ::ActiveRecord::Base.connection.open_transactions > 0
+      ::ActiveRecord::Base.connection.open_transactions.positive?
     end
 
     # @api public

lib/paper_trail/record_trail.rb

@@ -500,7 +500,7 @@ module PaperTrail
     end
 
     def log_version_errors(version, action)
-      version.logger && version.logger.warn(
+      version.logger&.warn(
         "Unable to create version for #{action} of #{@record.class.name}" +
           "##{@record.id}: " + version.errors.full_messages.join(", ")
       )