The new plugin uses a newer version of animalsniffer, allows overriding
the animalsniffer version used, and has up-to-date handling. The
up-to-date handling cuts fully incremental parallel build times in half,
from 5.5s to 2.7s.
The previous plugin was supposed to be verifying tests. However, either
it wasn't verifying them or its verification was broken.
io.grpc.nano sort of seems like a "small" version of grpc-java. And
io.grpc.proto could also mean multiple things. Using "protobuf"
and "protobuf nano" gets us consistent names that are still
understandable, predictable, and more similar to protobuf project
itself.