.rubocop.yml in my_api_client-0.17.0 vs .rubocop.yml in my_api_client-0.18.0

@@ -3,10 +3,10 @@
   - rubocop-rspec
 
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.4
+  TargetRubyVersion: 2.5
   NewCops: enable
   Exclude:
     - rails_app/**/*
     - vendor/bundle/**/*