Usage of `Buffer.from` breaks browser support

[edoardocavazza]

The latest release (9.4.0) won't work in the browser because of Buffer.from usage here.

[liaddrori1]

+1

[dolanmiu]

Thanks for this. Will fix

For reference, this PR here: https://github.com/dolanmiu/docx/pull/2943/files caused the issue