Gemfile in slack-ruby-client-2.1.0 vs Gemfile in slack-ruby-client-2.2.0

@@ -21,9 +21,11 @@
   gem 'rspec'
   gem 'rubocop', '1.26.1' # Lock to specific version to avoid breaking cops/changes
   gem 'rubocop-performance'
   gem 'rubocop-rake'
   gem 'rubocop-rspec'
+  gem 'simplecov'
+  gem 'simplecov-lcov'
   gem 'timecop'
   gem 'vcr'
   gem 'webmock'
 end