[camera] Update mocktail to latest. (flutter#5614)

Author: ditman

packages/camera/camera_web/example/integration_test/camera_test.dart

@@ -53,7 +53,7 @@ void main() {
     });
 
     setUpAll(() {
-      registerFallbackValue<CameraOptions>(MockCameraOptions());
+      registerFallbackValue(MockCameraOptions());
     });
 
     group('initialize', () {

packages/camera/camera_web/example/integration_test/camera_web_test.dart

@@ -76,9 +76,9 @@ void main() {
     });
 
     setUpAll(() {
-      registerFallbackValue<MediaStreamTrack>(MockMediaStreamTrack());
-      registerFallbackValue<CameraOptions>(MockCameraOptions());
-      registerFallbackValue<FlashMode>(FlashMode.off);
+      registerFallbackValue(MockMediaStreamTrack());
+      registerFallbackValue(MockCameraOptions());
+      registerFallbackValue(FlashMode.off);
     });
 
     testWidgets('CameraPlugin is the live instance',

packages/camera/camera_web/example/pubspec.yaml

@@ -18,4 +18,4 @@ dev_dependencies:
     sdk: flutter
   integration_test:
     sdk: flutter
-  mocktail: ^0.1.4
+  mocktail: ^0.3.0