It would be useful to be able to access the line json on each line emit

[oliverfoster]

https://github.com/juanjoDiaz/json2csv/blob/8c7895c11321410968893519fe86a60d98269ed0/packages/plainjs/src/StreamParser.ts#L195-L201

    processedData.forEach((row) => {
      const line = this.processRow(row);
      if (line === undefined) return;
      this.onLine(line, row); // <- add row here
      this.onData(this._hasWritten ? this.opts.eol + line : line);
      this._hasWritten = true;
    });

https://github.com/juanjoDiaz/json2csv/blob/8c7895c11321410968893519fe86a60d98269ed0/packages/node/src/Transform.ts#L38

this.streamParser.onLine = (line, row) => this.emit('line', line, row);