For cosmic I have performed the same validation of u-boot-tools 2018.07~rc3+dfsg1-0ubuntu2~18.10.1 on my very old alpha cosmic pi3 image. Looked good.
For cosmic I have performed the same validation of u-boot-tools 2018.07~ rc3+dfsg1- 0ubuntu2~ 18.10.1 on my very old alpha cosmic pi3 image. Looked good.