.rubocop.yml in sidekiq-logstash-2.0.3 vs .rubocop.yml in sidekiq-logstash-3.0.0

@@ -5,10 +5,10 @@
 
 AllCops:
   DisplayCopNames: true
   DisplayStyleGuide: true
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.7
 
 Metrics/BlockLength:
   Exclude:
     - spec/**/*.rb