Version 1:8.0.0-3 of designate is marked for autoremoval from testing on Tue 05 Nov 2019. It depends (transitively) on blockdiag, affected by #936219. You should try to prevent the removal by fixing these RC bugs.
Last update: 2019-10-18
Problems while searching for a new upstream version
uscan had problems while searching for a new upstream version:
In watchfile debian/watch, reading webpage
https://github.com/stackforge/designate/tags failed: 404 Not Found