Ruby 2.5 support for opening csv with bom|utf-8

csv_with_bom.rb

class CSV                                                                                                               
  def self.open(file, options={}, &block)                                                                               
    encoding = options.delete(:encoding)                                                                                
    File.open(file, "r:#{encoding}") do |fd|                                                                            
      yield CSV.new(fd, options)                                                                                        
    end                                                                                                                 
  end                                                                                                                   
end