GitLab

* Export symbols in the DLL (similar to https://github.com/rusty1s/pytorch_sparse/pull/198)

* Export symbols in the DLL (similar to https://github.com/rusty1s/pytorch_sparse/pull/198)

* Export symbols in the DLL (similar to https://github.com/rusty1s/pytorch_sparse/pull/198

)

* Update setup.py
Co-authored-by: Matthias Fey <matthias.fey@tu-dortmund.de>