```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)

Gem::Specification.new do |spec|
  spec.name          = 'chess_openings'
  spec.version       = '1.0.1'
  spec.authors       = ['Simão Neves']
  spec.email         = ['simaocostaneves@gmail.com']

  if spec.respond_to?(:metadata)
  end

  spec.summary       = 'Gem that allows you to calculate which opening was used in a chess game'
  spec.description   = 'Gem that allows you to know what chess opening was used in a chess game, find chess openings by name or get all openings that start with certain moves'
  spec.homepage      = 'http://www.github.com/simaoneves/chess_openings'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.executables << 'openings_parser'
  spec.require_paths = ['lib']

  spec.add_dependency 'pgn', '0.1.1'
  spec.add_dependency 'nokogiri', '1.6.6.2'
  spec.add_development_dependency 'bundler', '~> 1.8'
  spec.add_development_dependency 'rspec', '~> 3.3.0'
  spec.add_development_dependency 'rake', '~> 10.0'
  spec.add_development_dependency 'yard'
  spec.add_development_dependency 'pry'
end
```

Remove Nokogiri dependency, which is huge
user
```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)

Gem::Specification.new do |spec|
  spec.name          = 'chess_openings'
  spec.version       = '1.0.2'
  spec.authors       = ['Simão Neves']
  spec.email         = ['simaocostaneves@gmail.com']

  if spec.respond_to?(:metadata)
  end

  spec.summary       = 'Gem that allows you to calculate which opening was used in a chess game'
  spec.description   = 'Gem that allows you to know what chess opening was used in a chess game, find chess openings by name or get all openings that start with certain moves'
  spec.homepage      = 'http://www.github.com/simaoneves/chess_openings'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.require_paths = ['lib']

  spec.add_dependency 'pgn', '0.1.1'
  spec.add_development_dependency 'bundler', '~> 1.8'
  spec.add_development_dependency 'rspec', '~> 3.3.0'
  spec.add_development_dependency 'rake', '~> 10.0'
  spec.add_development_dependency 'yard'
  spec.add_development_dependency 'pry'
end
```
assistant