downgrade dependencies to 2.0

Source/MQTTnet.AspnetCore/MQTTnet.AspNetCore.csproj

@@ -18,8 +18,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Connections.Abstractions" Version="2.1.0" />
-    <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.1.0" />
-    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="2.1.0" />
+    <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="2.0.1" />
   </ItemGroup>
 
   <ItemGroup>

Tests/MQTTnet.TestApp.AspNetCore2/Program.cs

@@ -13,7 +13,10 @@ namespace MQTTnet.TestApp.AspNetCore2
 
         private static IWebHost BuildWebHost(string[] args) =>
             WebHost.CreateDefaultBuilder(args)
-                .UseKestrel(o => o.ListenAnyIP(1883, l => l.UseMqtt()))
+                .UseKestrel(o => {
+                    o.ListenAnyIP(1883, l => l.UseMqtt());
+                    o.ListenAnyIP(5000); // default http pipeline
+                })
                 .UseStartup<Startup>()
                 .Build();
     }