What is the minimum version of Xcode for publishing an application to the AppStore at the moment?

Question

iOS

There is an old MacBook Pro 13 inches mid-2009 with OS X 10.11.6 Capitan. The version of my Xcode 8.2.1 is the maximum that can be officially installed. As far as I know Apple restricts developers from publishing applications with minor versions of Xcode.
Question:
What is the minimum version of Xcode for publishing an application to the AppStore at the moment?
Thank you.

Answer 1

https://forums.developer.apple.com/thread/97657

Answer 2

Update if possible. https://artem.services/?p=722
I myself got into an unpleasant situation with an old version of xcode.
It got up without problems, just allocate 8GB of RAM to the virtual machine, everything is very sad for 3