Double quotes in double-quoted values not handled correctly

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Double quotes inside double-quoted values cause the parser to stop parsing at the row containing the double quote. When I run this:

`printf 'name,age\njoe,40\n"will"iam",30\n"sam",35\n"jan",25' | csv-parser`
`-------------------------------^ there's a double quote in here`

I get this:

```
{"name":"joe","age":"40"}
{"name":"will\"iam","age":"30\n\"sam\""}
```

It escaped the double quote nicely, but the "age" field is wrong, and the third and fourth rows were never parsed at all.

Reproduce the failure with the provided printf input piped to csv-parser, then trace how the parser handles double-quoted fields containing an internal quote. Done means the sample produces four rows, with the will"iam name preserved and the age values assigned to the correct rows.

Written by the indexing model from the issue text.