Duplicate function doesn't duplicate merged cells

[Aibaend]

Hello, Today I want to fill template excel, and I find somekind of bugs,
Duplicate function of this libary doesn't duplicate merged cells.

For example suppose that
for first row A and B merged,
and If I duplicate first row
result will be unmerged A and B

[xuri]

Thanks for your issue. I have fixed it. Please try to upgrade the library with the master branch code.