Gemfile in fastly-1.6.0 vs Gemfile in fastly-1.6.1

@@ -1,12 +1,12 @@
 source 'https://rubygems.org'
 
 gemspec
 
 group :development, :test do
+  gem 'appraisal', '~> 2.1'
   gem 'rake', '~> 10.3.2'
   gem 'rdoc', '~> 4.1.1'
   gem 'minitest', '~> 5.3.4'
   gem 'pry'
-  gem 'rubocop'
   gem 'webmock'
 end