.rubocop.yml in stylegen-0.2.0 vs .rubocop.yml in stylegen-0.3.0

- old
+ new

@@ -1,10 +1,10 @@
 require:
   - rubocop-rake
   - rubocop-minitest
 
 AllCops:
-  TargetRubyVersion: 2.4
+  TargetRubyVersion: 2.5
   NewCops: enable
 
 Style/StringLiterals:
   Enabled: true
   EnforcedStyle: double_quotes