Added empty object to components.

Author: darrelmiller

src/Microsoft.OpenApi/Models/OpenApiComponents.cs

@@ -79,6 +79,8 @@ public void SerializeAsV3(IOpenApiWriter writer)
             // If references have been inlined we don't need the to render the components section
             if (writer.GetSettings().ReferenceInline != ReferenceInlineSetting.DoNotInlineReferences)
             {
+                writer.WriteStartObject();
+                writer.WriteEndObject();
                 return;  
             }