.rubocop.yml in reek-5.6.0 vs .rubocop.yml in reek-6.0.0

@@ -7,10 +7,10 @@
 AllCops:
   Exclude:
     - 'samples/**/*'
     - 'tmp/**/*'
     - 'vendor/**/*'
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
 
 # Tables are nice
 Layout/HashAlignment:
   EnforcedColonStyle: table
   EnforcedHashRocketStyle: table