Tests started failing after move to pyproject.toml.

[jaraco]

As reported in python/importlib_resources#311 (comment), tests for this project started failing when merging the skeleton in 232f83d. The changes there were probably not relevant, but it seems that newer versions of setuptools may have started to trigger pypa/setuptools#3548.

I'm not sure what the proper fix is, but for this project to work around the issue, all that's needed is to move the resource out of the namespace package and load it from a subpackage.