"guessDelimiter" checks 10 rows, ignoring "preview" property

guessDelimiter is hardcoded to check the first 10 rows:

https://github.com/mholt/PapaParse/blob/b10b87ef8686c6f88299b50dd25e83606e9c36d4/papaparse.js#L1350-L1355

So even if preview is specified it will be ignored:

Papa.parse(file, {
  header: true,
  preview: 1
});

preview description says: If > 0, only that many rows will be parsed., so should the property be passed to guessDelimiter?

 var preview = new Parser({ 
 	comments: comments, 
 	delimiter: delim, 
 	newline: newline, 
 	preview
 }).parse(input);