Yeah, well, we had a frozen dependency tree via `pip-compile`, but `setuptools` is a package it won't freeze by default, so it snuck in as a transitive dependen

Yeah, well, we had a frozen dependency tree via `pip-compile`, but `setuptools` is a package it won't freeze by default, so it snuck in as a transitive dependency from https://github.com/googleapis/google-auth-library-python/issues/595 https://github.com/googleapis/google-auth-library-python/iss... . . .