Only keep the newest "X" releases and tags #58
Description
In order to keep the repository clean, we should think about removing old release branches and tags;
-> The packages will be kept.
(-> we could also keep the tags!?)
Describe the solution you'd like
We could perform this cleanup with a github action running after a release removing the oldest ones until we have reached our number we want to keep.
Describe alternatives you've considered
In the case somebody would need an older version we could also regenerate it and make it available for download again.