The last last 1.12.2-compatible version.

Future versions will be 1.13-only and will take advantage of new async chunk loading/generation APIs in Paper

So it's highly updated that you upgrade to that if you aren't using it, because the moment you do, Wilderness-TP will use even less time in timings and thus have even less "lag spikes" when loading chunks when finding a wild place to make ur player go wild