Generated file is 10 times bigger in size than file created from MS excel

[vodnokoki]

My reason: Generated file is too big comparing with file that is created from MS Excel

Steps to reproduce:

Opening in 7zip excel files created with MS Excel sheets xmls have some File size, and Packed size much less. In react-data-exported xlsx Packed size equals File size - so somehow react library is not packing properly. Maybe we need to pass some parameter additionally.

Lib Version: 0.5.0