refactor: Deprecations after dart upgrade

.github/workflows/versions.env

@@ -1,2 +1,2 @@
-flutter_version=3.10.6
-dart_version=3.0.6
+flutter_version=3.19.0
+dart_version=3.3.0

lib/src/models/receipts.dart

@@ -44,7 +44,7 @@ class Receipt {
   const Receipt(this.user, this.time);
 
   @override
-  bool operator ==(dynamic other) => (other is Receipt &&
+  bool operator ==(Object other) => (other is Receipt &&
       other.user == user &&
       other.time.millisecondsSinceEpoch == time.millisecondsSinceEpoch);
 

lib/src/room.dart

@@ -2364,7 +2364,7 @@ class Room {
       : setSpaceChild(roomId, via: const []);
 
   @override
-  bool operator ==(dynamic other) => (other is Room && other.id == id);
+  bool operator ==(Object other) => (other is Room && other.id == id);
 
   @override
   int get hashCode => Object.hashAll([id]);

lib/src/user.dart

@@ -175,7 +175,7 @@ class User extends Event {
       room.canChangePowerLevel && powerLevel < room.ownPowerLevel;
 
   @override
-  bool operator ==(dynamic other) => (other is User &&
+  bool operator ==(Object other) => (other is User &&
       other.id == id &&
       other.room == room &&
       other.membership == membership);

lib/src/utils/crypto/native.dart

@@ -1,3 +1,7 @@
+// ignore_for_file: deprecated_member_use
+// ignoring the elementAt deprecation because this would make the SDK
+// incompatible with older flutter versions than 3.19.0 or dart 3.3.0
+
 import 'dart:async';
 import 'dart:ffi';
 import 'dart:typed_data';

lib/src/utils/device_keys_list.dart

@@ -354,7 +354,7 @@ abstract class SignableKey extends MatrixSignableKey {
   String toString() => json.encode(toJson());
 
   @override
-  bool operator ==(dynamic other) => (other is SignableKey &&
+  bool operator ==(Object other) => (other is SignableKey &&
       other.userId == userId &&
       other.identifier == identifier);