Lost bold style formatting

[dmp73]

Today I have updated excelize (previous update was 2 or 3 month ago).
After that appeared problem with lost bold formatting on text in cells.

Open file in Excel, make some cells bold, save file.
Than, open and save file by Excelize, open again in Excel and all cells is not bold.

[xuri]

Hi @dmp73, thanks for your feedback. I have fixed it. Please try to upgrade the library with the master branch code.