cu2qu.test: load test package data using pkg_resources
cu2qu.test: load test package data using pkg_resources

The test suite is installed as a sub-package, so the test data must also be installed along with it.

The `__file__` attribute can be missing when importing a zipped package, so we load test files with `pkg_resources.resource_filename()`.

fonttools/fonttools,googlei18n/cu2qu,googlefonts/cu2qu,googlefonts/fonttools