lib/sycsvpro/filter.rb
def range(start_value, end_value, args, block)
        filter << (start_value.to_i..end_value.to_i).to_a
      end
def range(start_value, end_value, args, block)
        filter << (start_value.to_i..end_value.to_i).to_a
      end
Adds a range to the filter