Merge pull request #278 from PrivateStorageio/python3

.circleci/config.yml

.github/workflows/ci.yaml

default.nix

nix/sources.json

setup.cfg

shell.nix

src/_zkapauthorizer/_base64.py

src/_zkapauthorizer/_json.py

src/_zkapauthorizer/_plugin.py

src/_zkapauthorizer/_stack.py

src/_zkapauthorizer/_storage_client.py

src/_zkapauthorizer/_storage_server.py

src/_zkapauthorizer/config.py

src/_zkapauthorizer/configutil.py

src/_zkapauthorizer/controller.py

src/_zkapauthorizer/eliot.py

src/_zkapauthorizer/foolscap.py

src/_zkapauthorizer/lease_maintenance.py

src/_zkapauthorizer/model.py

src/_zkapauthorizer/private.py