.rubocop.yml in belated-0.5.2 vs .rubocop.yml in belated-0.5.3

- old
+ new

@@ -1,4 +1,5 @@
+require: rubocop-performance
 AllCops:
   TargetRubyVersion: 2.7
   NewCops: enable
 
 Style/StringLiterals:
\ No newline at end of file