Summary

Issue:
ExcelJs.stream.xlsx.WorkbookReader reading with styles: cache option was giving
Cannot read property 'date1904' of undefined

Reproduce with this code

const workbookReader = new excel.stream.xlsx.WorkbookReader(fileReadStream, { worksheets: 'emit', styles: 'cache', sharedStrings: 'cache', hyperlinks: 'ignore', entries: 'ignore' });
    workbookReader.read();
    workbookReader.on('worksheet', worksheet => { 
         worksheet.on('row', (row) => {...}
     }

Above code will throw an error when DD/MM/YYYY format date is given in the excel
e.g: 20/06/2020

I found that in lib/stream/xlsx/worksheet-reader.js we are using it but not checking for the undefined model case.