Fixed Flow response messages blocking the consumer

Caused by non-async disposable payload in MessageContext never being disposed

Tapeti/Config/IMessageContext.cs

@@ -8,7 +8,7 @@ namespace Tapeti.Config
     /// <summary>
     /// Provides information about the message currently being handled.
     /// </summary>
-    public interface IMessageContext : IAsyncDisposable, IDisposable
+    public interface IMessageContext : IAsyncDisposable
     {
         /// <summary>
         /// Provides access to the Tapeti config.

Tapeti/Default/MessageContext.cs

@@ -66,21 +66,21 @@ namespace Tapeti.Default
         }
 
 
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            foreach (var payload in payloads.Values)
-                (payload as IDisposable)?.Dispose();
-        }
-
-
         /// <inheritdoc />
         public async ValueTask DisposeAsync()
         {
             foreach (var payload in payloads.Values)
             {
-                if (payload is IAsyncDisposable asyncDisposable)
-                    await asyncDisposable.DisposeAsync();
+                switch (payload)
+                {
+                    case IAsyncDisposable asyncDisposable:
+                        await asyncDisposable.DisposeAsync();
+                        break;
+
+                    case IDisposable disposable:
+                        disposable.Dispose();
+                        break;
+                }
             }
         }