Chore: 1.30.0

# [1.30.0](v1.29.0...v1.30.0) (2021-05-21)

### Update

* Added methods for project invitation handling (coscine/issues#1528) ([ee1741ae](ee1741ae)), closes [coscine/issues#1528](https://git.rwth-aachen.de/coscine/issues/issues/1528)