Added missing dispose overrides in screens

lib/src/blocs/archive_bloc.dart

@@ -0,0 +1 @@
+class ArchiveBloc {}

lib/src/screens/archive_screen.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+import '../blocs/archive_bloc.dart';
+
+class ArchiveScreen extends StatefulWidget {
+  _ArchiveScreenstate createState() => _ArchiveScreenstate();
+}
+
+class _ArchiveScreenstate extends State<ArchiveScreen> {
+  final bloc = ArchiveBloc();
+
+  Widget build(BuildContext context) {
+    return Scaffold();
+  }
+}

lib/src/screens/events_screen.dart

@@ -80,4 +80,10 @@ class _EventsScreenState extends State<EventsScreen> {
           .toList(),
     );
   }
+
+  @override
+  void dispose() {
+    bloc.dispose();
+    super.dispose();
+  }
 }

lib/src/screens/new_event_screen.dart

@@ -65,4 +65,10 @@ class _NewEventScreenState extends State<NewEventScreen> {
     await bloc.submit();
     Navigator.of(context).pop();
   }
+
+  @override
+  void dispose() {
+    bloc.dispose();
+    super.dispose();
+  }
 }