Update Rakefile
Update Rakefile

Configure Rakefile for rubocop and yard

rack-webprofiler/rack-webprofiler,nicolas-brousse/rack-webprofiler,nicolas-brousse/rack-webprofiler,nicolas-brousse/rack-webprofiler,rack-webprofiler/rack-webprofiler,rack-webprofiler/rack-webprofiler