.rubocop.yml in lograge-sql-1.1.0 vs .rubocop.yml in lograge-sql-1.2.0

@@ -2,10 +2,10 @@
   - rubocop-performance
 
 AllCops:
   DisplayCopNames: true
   DisplayStyleGuide: true
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   Exclude:
     - gemfiles/vendor/bundle/**/*
 
 Metrics/BlockLength:
   Exclude: