Gemfile in html2rss-0.9.0 vs Gemfile in html2rss-0.10.0

@@ -1,8 +1,25 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 
-gem 'coveralls', require: false
-
 # Specify your gem's dependencies in html2rss.gemspec
 gemspec
+
+group :development, :test do
+  gem 'byebug'
+  gem 'rake'
+  gem 'rspec', '~> 3.0'
+  gem 'rubocop'
+  gem 'rubocop-md'
+  gem 'rubocop-performance'
+  gem 'rubocop-rake'
+  gem 'rubocop-rspec'
+  gem 'vcr'
+  gem 'yard'
+end
+
+group :test do
+  gem 'simplecov', require: false
+end