IEquatable for speed

IEquatable for speed in using EqualityComparer<TItem>.Default.Equals

Source/MQTTnet.Extensions.ManagedClient/ManagedMqttApplicationMessage.cs

@@ -2,10 +2,15 @@
 
 namespace MQTTnet.Extensions.ManagedClient
 {
-    public class ManagedMqttApplicationMessage
+    public class ManagedMqttApplicationMessage : IEquatable<ManagedMqttApplicationMessage>
     {
         public Guid Id { get; set; } = Guid.NewGuid();
 
         public MqttApplicationMessage ApplicationMessage { get; set; }
+       
+        public bool Equals(ManagedMqttApplicationMessage other)
+        {
+            return Id.Equals(other.Id);
+        }
     }
 }