Restrict importlib-metadata version
Twine isn't compatible with importlib-metadata 8 released yesterday.
Twine issue: https://github.com/pypa/twine/issues/977
Part of iwoca/devops/support#290
Twine isn't compatible with importlib-metadata 8 released yesterday.
Twine issue: https://github.com/pypa/twine/issues/977
Part of iwoca/devops/support#290