Chore: 1.8.0

# [1.8.0](v1.7.0...v1.8.0) (2021-04-23)

### New

* Created a loading form skeleton (coscine/issues#1427) ([cb20703a](cb20703a)), closes [coscine/issues#1427](https://git.rwth-aachen.de/coscine/issues/issues/1427)