Allow credentials for CORS required by SignalR

Author: acjh

aspnet-core/src/AbpCompanyName.AbpProjectName.Web.Host/Startup/Startup.cs

@@ -67,6 +67,9 @@ public IServiceProvider ConfigureServices(IServiceCollection services)
                         )
                         .AllowAnyHeader()
                         .AllowAnyMethod()
+#if FEATURE_SIGNALR_ASPNETCORE
+                        .AllowCredentials()
+#endif
                 )
             );