use typed check instead of comparing a string for event type

lib/widgets/renderers/event.dart

@@ -83,10 +83,10 @@ class const EventRenderer(
         .watch(SettingsController.provider)
         .maybeWhen(
           orElse: () => false,
-          data: (settings) => settings.hideMembershipEvents ? true : false,
+          data: (settings) => settings.hideMembershipEvents,
         ));
 
-    if (event.type == "m.room.member" && hideMembershipEvents) {
+    if (event.content is MembershipContent && hideMembershipEvents) {
       return SizedBox.shrink();
     }