pyproject.toml: include subpackages in setuptools config
pyproject.toml: include subpackages in setuptools config

The glob patterns (include/exclude) must match the entire package name
to take effect, so we need to add a wildcard pattern for subpackages.

Otherwise, any wheels built won't include subpackages (like
pathspec.patterns) and things will break >.<

cpburnz/python-path-specification,cpburnz/python-path-specification