Merge pull request #271 from tp-la/recording-spender

setup.cfg

src/_zkapauthorizer/_plugin.py

src/_zkapauthorizer/_storage_server.py

src/_zkapauthorizer/server/__init__.py

src/_zkapauthorizer/server/spending.py

src/_zkapauthorizer/tests/matchers.py

src/_zkapauthorizer/tests/test_storage_protocol.py

src/_zkapauthorizer/tests/test_storage_server.py