Docx: release new version

[thojansen]

@dolanmiu: I was wondering if it would be possible to release a new version to npm. The current verison 5.3.0 is already 3 months old and I cannot easily point directly to the latest commit on the master branch, since the build step is missing and if I try to build it in a postinstall step, I run into various typescript problems. So the only other option would be to also push it to npm under another name.

[dolanmiu]

Will do later this week!

Wanted to put in some extra changes before 5.4.0

[dolanmiu]

Released!