attributor 2.3.0

• backports 3.25.0 ~> 3

• bundler 2.5.9 >= 0

• fuubar 1.3.3 ~> 1

• guard 2.18.1 ~> 2

• guard-rspec 4.7.3 ~> 4

• pry 0.14.2 ~> 0

• pry-byebug 1.3.3 ~> 1

• pry-stack_explorer 0.6.1 ~> 0

• rake-notes 0.2.2 ~> 0

• redcarpet 2.3.0 < 3.0

• rspec 2.14.1 < 2.99

• simplecov 0.22.0 ~> 0

• yard 0.8.7.6 ~> 0.8.7

• yardstick 0.9.9 ~> 0