This is needed to import spglib in a cmake project. For this, the targets should also be exported with appropriate `NAMESPACE`. [Example from `nlopt`](https://github.com/stevengj/nlopt/blob/97a1e789d6e6cd46d94147a8fbcccf2ecb003aac/CMakeLists.txt#L386-L411)
This is needed to import spglib in a cmake project.
For this, the targets should also be exported with appropriate
NAMESPACE. Example fromnlopt