luffa 2.0.0

• bundler 1.17.3 ~> 1.6

• growl 1.0.3 ~> 1.0

• guard-bundler 2.2.1 ~> 2.0

• guard-rspec 4.7.3 ~> 4.3

• pry 0.14.2 >= 0

• pry-nav 1.0.0 >= 0

• rake 10.5.0 ~> 10.3

• redcarpet 3.6.0 ~> 3.1

• rspec 3.13.0 ~> 3.0

• stub_env 1.0.4 < 2.0, >= 1.0.1

• travis 1.13.3 ~> 1.7

• yard 0.9.36 ~> 0.8