Merge branch '5.4'

diff --cc package.xml
index 6f3ee5c303d75742f2ada6c9804df29b93da0b9b,16082d3b44184744a02a8efd0321ff1bb0e14267..1a9e069f175de4a86c4a52bb99e3754e1221a0a2
--- 1/package.xml
--- 2/package.xml
+++ b/package.xml
@@@ -5,8 -5,8 +5,8 @@@
                <packagename language="de">WoltLab Suite Core: Konversationen</packagename>
                <packagedescription>Private conversations between multiple users</packagedescription>
                <packagedescription language="de">Private Konversationen zwischen mehreren Benutzern</packagedescription>
 -              <version>5.4.14 dev 1</version>
 +              <version>5.5.0 Alpha 1</version>
-               <date>2021-12-22</date>
+               <date>2022-02-10</date>
        </packageinformation>
        
        <authorinformation>