.rubocop.yml in devise-security-0.14.0 vs .rubocop.yml in devise-security-0.14.1

@@ -1,6 +1,6 @@
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   Include:
     - '**/Rakefile'
     - '**/config.ru'
     - 'lib/tasks/**/*'
   Exclude: