upgrade rubocop to the latest version

Author: bennacer860

Gemfile

@@ -8,7 +8,7 @@ branch = File.read(File.expand_path("../maintenance-branch", __FILE__)).chomp
   if File.exist?(library_path) && !ENV['USE_GIT_REPOS']
     gem lib, :path => library_path
   else
-    gem lib, :git => "git://github.com/rspec/#{lib}.git", :branch => branch
+    gem lib, :git => "https://github.com/rspec/#{lib}.git", :branch => branch
   end
 end
 
@@ -29,7 +29,7 @@ platforms :jruby do
 end
 
 gem 'simplecov', '~> 0.8'
-gem 'rubocop', "~> 0.23.0", :platform => [:ruby_19, :ruby_20, :ruby_21]
+gem 'rubocop', "~> 0.32.1", :platform => [:ruby_19, :ruby_20, :ruby_21, :ruby_22]
 gem 'test-unit', '~> 3.0' if RUBY_VERSION.to_f >= 2.2
 
 eval File.read('Gemfile-custom') if File.exist?('Gemfile-custom')