Rakefile in datadog-notifications-0.5.0 vs Rakefile in datadog-notifications-0.5.1

@@ -1,12 +1,12 @@
 require "bundler/gem_tasks"
 
 begin
   Bundler.setup(:default, :development)
 rescue Bundler::BundlerError => e
-  $stderr.puts e.message
-  $stderr.puts "Run `bundle install` to install missing gems"
+  warn e.message
+  warn "Run `bundle install` to install missing gems"
   exit e.status_code
 end
 
 require 'rake'
 
@@ -15,6 +15,9 @@
 
 RSpec::Core::RakeTask.new(:spec) do |spec|
   spec.pattern = FileList['spec/**/*_spec.rb']
 end
 
-task :default => :spec
+require 'rubocop/rake_task'
+RuboCop::RakeTask.new(:rubocop)
+
+task default: %i[spec rubocop]