close out protobuf 4.23.3 migration; drop protobuf 3.21#4768

Merged

hmaarrfk merged 2 commits intoconda-forge:mainfrom h-vetinari:proto4

Aug 21, 2023

+5-3

Commits on Aug 11, 2023

close out protobuf 4.23 migration
h-vetinari
committed

Commits on Aug 21, 2023

only soft-close protobuf 4.23.3 migration
h-vetinari
committed