Deprecated command - buf protoc

[mfridman]

Hey there, interesting project.

Just a heads up the buf protoc command has moved to buf alpha protoc and may in the future be deprecated entirely. More details here: https://github.com/bufbuild/buf/pull/915

I noticed it was being used here: https://github.com/Kava-Labs/kava/blob/master/scripts/protocgen.sh#L20

Bonus, it'd be pretty neat if you published the protos to the Buf Schema Registry. Happy to help if you have any questions.