release: 1.2.1 (#23)

* release: 1.2.0.

* fix layout for media select button.

* expose more fields for TrackIdentifier.

* more changes.

* more changes.

* update.

* fix.

* update.

* update.

* dart run import_sorter:main --no-comments.

* update.

* fix.

* release: 1.2.1.

* release: 1.2.1.

Author: cloudwebrtc

pubspec.yaml

@@ -9,6 +9,7 @@ environment:
 
 dependencies:
   chat_bubbles: ^1.6.0
+  collection: ^1.19.0
   flutter:
     sdk: flutter
   flutter_background: ^1.3.0+1