Merge branch 'feat/custom-attachment-upload' of https://github.com/GetStream/stream-chat-flutter into feat/custom-attachment-upload

packages/stream_chat_flutter/lib/src/attachment/attachment_widget.dart

@@ -11,6 +11,7 @@ enum AttachmentSource {
 extension AttachmentSourceX on AttachmentSource {
   /// The [when] method is the equivalent to pattern matching.
   /// Its prototype depends on the AttachmentSource defined.
+  // ignore: missing_return
   T when<T>({
     @required T Function() local,
     @required T Function() network,

packages/stream_chat_flutter/lib/src/image_footer.dart

@@ -142,10 +142,6 @@ class _ImageFooterState extends State<ImageFooter> {
   }
 
   void _showPhotosModal(context) {
-    var videoAttachments = widget.mediaAttachments
-        .where((element) => element.type == 'video')
-        .toList();
-
     showModalBottomSheet(
       context: context,
       barrierColor: StreamChatTheme.of(context).colorTheme.overlay,

packages/stream_chat_flutter/lib/src/utils.dart

@@ -4,7 +4,6 @@ import 'package:url_launcher/url_launcher.dart';
 
 import '../stream_chat_flutter.dart';
 import 'stream_svg_icon.dart';
-import 'dart:math';
 
 Future<void> launchURL(BuildContext context, String url) async {
   if (await canLaunch(url)) {