Updated SetOptions logic to allow calling on client without credentials

CryptoExchange.Net/Interfaces/Clients/IRestClient.cs

@@ -28,6 +28,12 @@ namespace CryptoExchange.Net.Interfaces.Clients
         /// Whether client is disposed
         /// </summary>
         bool Disposed { get; }
+
+        /// <summary>
+        /// Update specific options
+        /// </summary>
+        /// <param name="options">Options to update. Only specific options are changeable after the client has been created</param>
+        void SetOptions(UpdateOptions options);
     }
 
     /// <inheritdoc />

CryptoExchange.Net/Interfaces/Clients/ISocketClient.cs

@@ -60,6 +60,12 @@ namespace CryptoExchange.Net.Interfaces.Clients
         /// </summary>
         /// <returns></returns>
         Task UnsubscribeAllAsync();
+
+        /// <summary>
+        /// Update specific options
+        /// </summary>
+        /// <param name="options">Options to update. Only specific options are changeable after the client has been created</param>
+        void SetOptions(UpdateOptions options);
     }
 
     /// <inheritdoc />