pyproject.toml: Bump minimal required Python version to 3.9 Add missing test-dependency on swh.scheduler pytest plugin Require swh-storage[pytest] instead of swh-storage[testing] Require the swh.journal pytest plugin explicitly Migrate from deprecated pkg_resources package to importlib.metadata requirements-test: Use confluent-kafka type stubs Apply swh-py-template v0.3.3 with copier Apply swh-py-template v0.2.3 Apply swh-py-template v0.2.0 tox: Bump mypy to 1.8.0