Version 1.21.0-3 of docker-compose is marked for autoremoval from testing on Sat 16 Nov 2019. It depends (transitively) on docopt, affected by #941638. You should try to prevent the removal by fixing these RC bugs.
Last update: 2019-10-14
A new upstream version is available: 1.25.0~rc2high
A new upstream version 1.25.0~rc2 is available, you should consider packaging it.