Bug#1072214: python3-proto-plus declares Conflicts: nanopb in violation of Debian policy 10.1

[Helmut Grohne]

Package: python3-proto-plus
Version: 1.23.0-2
Severity: serious
Justification: policy 10.1

python3-proto-plus declares a conflict with nanopb. Doing so violates
Debian policy section 10.1. More background can be found in #1072073.

Helmut