Release2.1

Release preparations:

• Removed very technical entries in the changelog, tried to unify the wording
• version string

Anything missing @palmb and @luenensc ?

closes %2.1.0 😎

changed milestone to %2.1.0

assigned to @schaefed

requested review from @palmb

changed the description

added 1 commit

• 79ae5da5 - cosmetic changes

Compare with previous version

approved this merge request

changed the description

merged

mentioned in commit 91417853

mentioned in commit 63b55c6d

mentioned in commit 684dc8a0

mentioned in commit 8f7a90e4