Gemfile in gir_ffi-0.9.0 vs Gemfile in gir_ffi-0.9.1

@@ -1,9 +1,11 @@
 source 'https://rubygems.org'
 
 # The gem's dependencies are specified in gir_ffi.gemspec
 gemspec
 
+gem 'rubocop', '~> 0.36.0', type: :development
+
 if ENV['CI']
   if ENV['TRAVIS_RUBY_VERSION'] == '2.2'
     gem 'coveralls', type: :development
   end
 else