.rubocop.yml in jekyll-sitemap-0.12.0 vs .rubocop.yml in jekyll-sitemap-0.13.0

@@ -1,9 +1,9 @@
 inherit_gem:
   jekyll: .rubocop.yml
 
 AllCops:
-  TargetRubyVersion: 1.9
+  TargetRubyVersion: 2.0
   Include:
     - lib/*.rb
 
   Exclude:
     - script/**/*