mackarel 0.4.0

• awesome_print 1.9.2 >= 0

• bundler 1.17.3 ~> 1.12

• byebug 11.1.3 >= 0

• guard 2.19.0 >= 0

• guard-rspec 4.7.3 >= 0

• nokogiri 1.16.7 >= 0

• pry 0.15.0 >= 0

• rack 3.1.8 >= 0

• rack-test 2.1.0 >= 0

• rake 10.5.0 ~> 10.0

• sinatra 4.0.0 >= 0

• tilt 2.4.0 >= 0