The Towny devs created an API with newer builds. Latest for current day is: https://github.com/TownyAdvanced/Towny/releases/tag/0.95.0.4
The integration should be updated.
Kind Regards.

Unfortunately their maven repo appear to be set to private and require a github token for read access. I'll consider if there is a good way to integrate this into the build but it does mean that every person who tries to build this will also require their own tokens which I'm personally reluctant to do.

One options is to build it myself and host it on my own repo.

Once upon a time I did setup an artifactory instance at http://repo.zno.de just to provide some necessary dependencies specifically for this build that hadn't been published otherwise. I think nowadays we're better off publishing to a bintray repo.

I have a nexus repo so could potentially publish deps to there. Bintray looks like it costs a fee.

Bintray is free for open source repos

Unfortunately their maven repo appear to be set to private and require a github token for read access. I'll consider if there is a good way to integrate this into the build but it does mean that every person who tries to build this will also require their own tokens which I'm personally reluctant to do.

One options is to build it myself and host it on my own repo.

This has since been addressed - TownyAdvanced has moved it's primary maven and javadoc ingest to Jitpack.io.