Error when uploading app with Application Loader: ERROR ITMS-90725: "SDK Version Issue. This app was build with the iOS 11.4 SDK

I have Swift 3.2 project and I am developing this old project with Xcode 9.4.1 (9F2000) because Xcode 10.2.1 does not accept old Swift languages like Swift 3.2 which is a shame.

So I developed my application in the Xcode 9.4.1 and I want to upload on the App Store. I archived this app on the Xcode 9.4.1.

I tried to upload app all Xcode version and all way. I tried to upload with using Xcode 9.4.1 and Xcode 10.2.1. I try on Application Loader which is Xcode 9.4.1 and Xcode 10.2.1. And there is gives same error all the time.

This is the error message and screen:

ERROR ITMS-90725: "SDK Version Issue. This app was built with the iOS 11.4 SDK. All iOS apps submitted to the App Store must be built with the iOS 11 SDK or later, included in Xcode 9 or later. Furter, starting March 2019, all iOS apps submitted to the App Store must be built with the iOS 12.1 SDK or later, included in Xcode 10.1 or later."

I have already added all SDK of iOS to my Xcode 9.4.1

How can I upload this app with old version?

I found the solution. Uploading Swift 3 projects is complicated now in 2019 but doable.

I can use Xcode 10.1 with Swift 3. I am developing and archived my app in Xcode 10.1. When I tried distribute app on Xcode 10.1 "Certificate: Unknown" came on Summary. So I upload app (Distribute App) on Xcode 10.2.1 which is the last version of Xcode.