Assign row number to each record

Summary

The idea is to opt into adding a row number and having that value assigned to a configured property.

Motivation

It's handy for me because it allows my user interface to tell the user where that data has come from better.

Alternative

I have considered adding a row number to my CSV raw data before putting it in csv-parse.

Draft

parse({
  row: true, // will result in a row property added to each record
  row: 'some_other_field' // will assign the row number to that field.
})

Start by reading the csv-parse option handling and existing parser tests to determine how an opt-in row number could be exposed and assigned to each record. Compare the proposed row: true and row: 'some_other_field' forms, then define tests showing the configured property and numbering behavior before considering the feature complete.