fix groupUpdate including an empty kicked field

ts/components/conversation/GroupNotification.tsx

@@ -79,9 +79,7 @@ export class GroupNotification extends React.Component<Props> {
         }
 
         if (!contacts || !contacts.length) {
-          // FIXME audric
-          return 'FIXME audric';
-          // throw new Error('Group update kicked is missing contacts');
+          throw new Error('Group update kicked is missing contacts');
         }
 
         const kickedKey =

ts/receiver/queuedJob.ts

@@ -55,7 +55,7 @@ async function handleGroups(
     if (removedMembers.includes(ourNumber)) {
       groupUpdate.kicked = 'You';
       attributes.isKickedFromGroup = true;
-    } else {
+    } else if (removedMembers.length) {
       groupUpdate.kicked = removedMembers;
     }
   } else if (group.type === GROUP_TYPES.QUIT) {