Gemfile in sidekiq-prometheus-exporter-0.2.0 vs Gemfile in sidekiq-prometheus-exporter-0.2.1

@@ -2,5 +2,18 @@
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 
 # Specify your gem's dependencies in sidekiq-prometheus-exporter.gemspec
 gemspec
+
+gem 'appraisal', '~> 2.2'
+gem 'bundler', '~> 2.1'
+gem 'pry', '~> 0.14'
+gem 'pry-byebug', '~> 3.6'
+gem 'rack-test', '~> 1.1'
+gem 'rake', '~> 13.0'
+gem 'rspec', '~> 3.0'
+gem 'rubocop', '~> 1.22'
+gem 'rubocop-performance', '~> 1.12'
+gem 'rubocop-rake', '~> 0.6'
+gem 'rubocop-rspec', '~> 2.6'
+gem 'timecop', '~> 0.9'