Code review comment for ~bryce/ubuntu/+source/convoy:convoy-fix-x-focal

Ack that there is no reverse depends on python-convoy
Ack to the general changes
Nit Picks:
- changelog doesn't mention e.g. d/rules changes for --buildsystem=pybuild
- maybe split the long paragraph in sub-bullets prefixed by the files the chagne takes place

All of the above is style and you could even say "nah I like mine better".
+1 to the actual functional changes.