Unable to render em and strong tag.

[Fatih20]

I am currently using this library to add an export functionality to my application that utilizes TipTap (which uses prosemirror under the hood). Despite what the README of this document has said, from what I've tried in this code sandbox (which itself is a fork from this code sandbox), it's evident that both bold and italic text aren't rendered properly in the resulting docx document.

I am interested in fixing the issue and contributing upstream, but I have concern on whether or not this library is still being maintained.