Merge branch '5.4'

diff --cc .github/workflows/codestyle.yml
Simple merge

diff --cc package.xml
index 1301f733def515a7772897f6d05bc92cf7a3472e,67a1f76fe697b8df1ef6efcdaf0ca8e97f0d97a5..1614d9b8e1597e477339940cda0c7f80b7aa7949
--- 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>5.4.15</version>
 +              <version>5.5.0 Alpha 1</version>
-               <date>2022-03-10</date>
+               <date>2022-03-17</date>
        </packageinformation>
        
        <authorinformation>