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

@@ -1,10 +1,10 @@
 inherit_gem:
   rubocop-config-umbrellio: lib/rubocop.yml
 
 AllCops:
   DisplayCopNames: true
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   Include:
     - bin/console
     - Gemfile
     - ezclient.gemspec
     - Rakefile