The previous package broke the application, today
apt(8) fetched a new package, and the complete changelog reads:
signal-desktop (1.27.2) whatever; urgency=medium
Package created with FPM.
-- Open Whisper Systems <email@example.com> Fri, 06 Sep 2019 15:36:44 -0700
That is useless. The changelog should provide, at minimum, a summary of the changes between this version and the previous one.