[#58] civix upgrade

info.xml

@@ -14,18 +14,25 @@
     <url desc="Support">https://github.com/systopia/de.systopia.twingle/issues</url>
     <url desc="Licensing">http://www.gnu.org/licenses/agpl-3.0.html</url>
   </urls>
-  <releaseDate></releaseDate>
+  <releaseDate/>
   <version>1.4-dev</version>
   <develStage>dev</develStage>
   <compatibility>
     <ver>5.0</ver>
     <ver>5.19</ver>
   </compatibility>
-  <comments></comments>
+  <comments/>
   <requires>
     <ext>de.systopia.xcm</ext>
   </requires>
   <civix>
     <namespace>CRM/Twingle</namespace>
+    <format>22.10.0</format>
   </civix>
+  <mixins>
+    <mixin>menu-xml@1.0.0</mixin>
+  </mixins>
+  <classloader>
+    <psr0 prefix="CRM_" path="."/>
+  </classloader>
 </extension>