Use protobufjs-cli package once it is released

[daniel-wer]

Executing the tests locally (yarn test) fails, because protobufjs internally calls npm install to install some dependencies. In the past we've included these dependencies in our own devDependencies but this breaks without notice if protobufjs adds new dependencies and is confusing. They have recognized this as the dark pattern causing problems that it is and will release a separate protobufjs-cli package which includes these dependencies. Let's switch to that once it becomes available.

[daniel-wer]

Apparently protobufjs-cli is still not properly released, see this PR.