Update sdk

lib/components/list_items/presence_list_item.dart

@@ -19,7 +19,7 @@ class PresenceListItem extends StatelessWidget {
     return FutureBuilder<Profile>(
         future: Matrix.of(context).client.getProfileFromUserId(presence.sender),
         builder: (context, snapshot) {
-          MxContent avatarUrl = MxContent('');
+          Uri avatarUrl;
           String displayname = presence.sender.localpart;
           if (snapshot.hasData) {
             avatarUrl = snapshot.data.avatarUrl;

lib/components/list_items/public_room_list_item.dart

@@ -30,8 +30,11 @@ class PublicRoomListItem extends StatelessWidget {
     final bool hasTopic =
         publicRoomEntry.topic != null && publicRoomEntry.topic.isNotEmpty;
     return ListTile(
-      leading:
-          Avatar(MxContent(publicRoomEntry.avatarUrl), publicRoomEntry.name),
+      leading: Avatar(
+          publicRoomEntry.avatarUrl == null
+              ? null
+              : Uri.parse(publicRoomEntry.avatarUrl),
+          publicRoomEntry.name),
       title: Text(hasTopic
           ? "${publicRoomEntry.name} (${publicRoomEntry.numJoinedMembers})"
           : publicRoomEntry.name),