Rakefile in pairing_heap-1.0.0 vs Rakefile in pairing_heap-2.0.0

@@ -1,12 +1,13 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
 require "rake/testtask"
+require "standard/rake"
 
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
   t.test_files = FileList["test/**/*_test.rb"]
 end
 
-task default: %i[test]
+task default: %i[test standard]