Rename AbstractHybridConstructionKEM #59
Description
(This issue has been imported from the Gitlab repository because it seems to not have been addressed yet)
Original Text (Issue 204)
It should still be something like Abstract<Something>KEM but the HybridConstruction part is a little bit misleading. It is also preferable that the new name contains SymmetricKey as the construction yields a symmetric key, not a group element or something.