.rubocop.yml in valvat-1.3.0 vs .rubocop.yml in valvat-1.4.0

@@ -1,8 +1,8 @@
 require: rubocop-rspec
 AllCops:
     NewCops: enable
-    TargetRubyVersion: 2.5
+    TargetRubyVersion: 2.6
 
 Metrics/BlockLength:
   Exclude:
     - valvat.gemspec
     - spec/**/*_spec.rb