Rakefile in virtus-1.0.3 vs Rakefile in virtus-1.0.4

@@ -1,5 +1,15 @@
-# encoding: utf-8
+require "rspec/core/rake_task"
 
-require 'devtools'
+RSpec::Core::RakeTask.new(:spec)
+task default: [:spec]
 
-Devtools.init_rake_tasks
+begin
+  require "rubocop/rake_task"
+
+  Rake::Task[:default].enhance [:rubocop]
+
+  RuboCop::RakeTask.new do |task|
+    task.options << "--display-cop-names"
+  end
+rescue LoadError
+end