column split issues about doubled-up qualifier

[yzi2004]

Our CSV file has a column that contains JSON-formatted data, so it includes many doubled-up qualifier. We found that sometimes the fields are not split correctly.
During debugging, we found that when reading a chunk, if the read ends just before first qualifier of a doubled-up qualifier in json data, it causes an error.

Therefore, if the last character of a line is a qualifier and there is not end of stream, it should continue reading the next chunk.

`internal class Program
{
static void Main(string[] args)
{
var settings = new CSVSettings()
{
HeaderRowIncluded = true,
BufferSize = 119,
HeadersCaseSensitive = false
};

    string csvFile = "sample.csv";

    using (var csv = CSVReader.FromFile(csvFile, settings))
    {
        foreach (var line in csv.Lines())
        {
            Console.WriteLine(line[7]);
        }
    }
}

}
sample.csv
`

[tspence]

This is a really interesting find! Let me work on a test case for this so we can validate it.