Merge branch '5.4'

diff --cc package.xml
index f27d07f34926a5b6d003c7ca656fad954e91252d,546277b6dfe1e0f67e8ea93e3a67ebe05b27dbf0..6318dc480011824f8106d78d9ccb9499447ae2c4
--- 1/package.xml
--- 2/package.xml
+++ b/package.xml
@@@ -5,8 -5,8 +5,8 @@@
                <packagename language="de">WoltLab Suite Core: Importer</packagename>
                <packagedescription>Import data from other discussion board systems.</packagedescription>
                <packagedescription language="de">Ermöglicht den Datenimport aus anderen Forensystemen.</packagedescription>
 -              <version>5.4.15 dev 1</version>
 +              <version>5.5.0 Alpha 1</version>
-               <date>2022-02-15</date>
+               <date>2022-03-10</date>
        </packageinformation>
        
        <authorinformation>