fix: Missing null fallback when update notificationCount

Previously when using RoomUpdate in the constructor the notificationCount to update
was never null and set to 0 if it was missing. Now that we are
no longer using it, I forgot to
add the null fallback at this point.
This leads to serious crashes in the apps at runtime
and thats why I bump the version here as well!

CHANGELOG.md

@@ -1,3 +1,6 @@
+## [0.5.1] - 13nd Sep 2021
+- fix: Room.notificationCount set to null sometimes
+
 ## [0.5.0] - 13nd Sep 2021
 - hotfix: Key sharing security vulnerability! -> Please upgrade as soon as possible to this version
 - feat: MSC2746: Improved Signalling for 1:1 VoIP

lib/src/client.dart

@@ -1513,8 +1513,9 @@ class Client extends MatrixApi {
             chatUpdate.timeline?.prevBatch != null)) {
       rooms[j].membership = membership;
       rooms[j].notificationCount =
-          chatUpdate.unreadNotifications?.notificationCount;
-      rooms[j].highlightCount = chatUpdate.unreadNotifications?.highlightCount;
+          chatUpdate.unreadNotifications?.notificationCount ?? 0;
+      rooms[j].highlightCount =
+          chatUpdate.unreadNotifications?.highlightCount ?? 0;
       if (chatUpdate.timeline?.prevBatch != null) {
         rooms[j].prev_batch = chatUpdate.timeline?.prevBatch;
       }

pubspec.yaml

@@ -1,6 +1,6 @@
 name: matrix
 description: Matrix Dart SDK
-version: 0.5.0
+version: 0.5.1
 homepage: https://famedly.com
 
 environment: