Gemfile in twog-0.3.5 vs Gemfile in twog-0.3.6

@@ -1,16 +1,20 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
-ruby '2.7.1'
+ruby '3.0'
 
-gem 'rack', '~>2.0.6'
-gem 'nokogiri', '>= 1.10.4'
-gem 'twitter_oauth', '>=0.3.3'
-gem 'bitly', '>=0.4.0'
-gem 'whenever', '>=0.4.1'
-gem 'activesupport', '>=2.3.5'
-gem 'juwelier', '>= 2.4.9'
+gem 'activesupport'
+gem 'bitly'
+gem 'juwelier'
+gem 'nokogiri'
+gem 'rack'
+gem 'rss'
+gem 'twitter_oauth'
+gem 'whenever'
 
 group :development, :test do
   gem 'rake'
-  gem 'rspec', '>=2.0.0.beta.22'
+  gem 'rspec'
+  gem 'rubocop'
   gem 'simplecov'
 end