undefined method `Pathname' for Dry::Validation:Module

[ndan]

it seems require 'pathname' is not present in the code

irb(main):001:0> require 'dry-validation'
Traceback (most recent call last):
       16: from /Users/daniil/.rbenv/versions/2.6.3/bin/irb:23:in `<main>'
       15: from /Users/daniil/.rbenv/versions/2.6.3/bin/irb:23:in `load'
       14: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top (required)>'
       13: from (irb):1
       12: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:34:in `require'
       11: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:130:in `rescue in require'
       10: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:130:in `require'
        9: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/dry-validation-1.2.0/lib/dry-validation.rb:3:in `<top (required)>'
        8: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:65:in `require'
        7: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:65:in `require'
        6: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/dry-validation-1.2.0/lib/dry/validation.rb:3:in `<top (required)>'
        5: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:65:in `require'
        4: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:65:in `require'
        3: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/dry-validation-1.2.0/lib/dry/validation/constants.rb:5:in `<top (required)>'
        2: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/dry-validation-1.2.0/lib/dry/validation/constants.rb:6:in `<module:Dry>'
        1: from /Users/daniil/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/dry-validation-1.2.0/lib/dry/validation/constants.rb:18:in `<module:Validation>'
NoMethodError (undefined method `Pathname' for Dry::Validation:Module)