.rubocop.yml in recite_csv-0.2.0 vs .rubocop.yml in recite_csv-1.0.0

@@ -1,6 +1,8 @@
+require: rubocop-performance
+
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
 
 Style/AsciiComments:
   Enabled: false
 
 Style/Documentation: