```ruby
# encoding: UTF-8
Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'solidus_sale_pricing'
  s.version     = '2.0.0.alpha'
  s.summary     = 'Sale pricing for Solidus'
  s.description = 'Solidus extension to set sale products with start and end date.'
  s.required_ruby_version = '>= 2.1'

  s.author    = 'Jonathan Tapia'
  s.email     = 'jonathan.tapia@magmalabs.io'

  s.files       = `git ls-files`.split("\n")
  s.test_files  = `git ls-files -- {test,spec,features}/*`.split("\n")
  s.require_path = 'lib'
  s.requirements << 'none'

  s.add_dependency 'solidus', '~> 1.0'

  s.add_development_dependency 'rspec-rails','~> 3.2'
  s.add_development_dependency 'sqlite3'
  s.add_development_dependency 'sass-rails'
  s.add_development_dependency 'coffee-rails'
  s.add_development_dependency 'factory_girl', '~> 4.2'
  s.add_development_dependency 'capybara', '~> 2.1'
  s.add_development_dependency 'database_cleaner'
  s.add_development_dependency 'ffaker'
end
```

Add support for solidus 2
user
```ruby
# encoding: UTF-8
Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'solidus_sale_pricing'
  s.version     = '2.0.0.alpha'
  s.summary     = 'Sale pricing for Solidus'
  s.description = 'Solidus extension to set sale products with start and end date.'
  s.required_ruby_version = '>= 2.1'

  s.author    = 'Jonathan Tapia'
  s.email     = 'jonathan.tapia@magmalabs.io'

  s.files       = `git ls-files`.split("\n")
  s.test_files  = `git ls-files -- {test,spec,features}/*`.split("\n")
  s.require_path = 'lib'
  s.requirements << 'none'

  s.add_dependency 'solidus', ['>= 1.0', '< 3']

  s.add_development_dependency 'rspec-rails','~> 3.2'
  s.add_development_dependency 'sqlite3'
  s.add_development_dependency 'sass-rails'
  s.add_development_dependency 'coffee-rails'
  s.add_development_dependency 'factory_girl', '~> 4.2'
  s.add_development_dependency 'capybara', '~> 2.1'
  s.add_development_dependency 'database_cleaner'
  s.add_development_dependency 'ffaker'
end
```
assistant