As stated by apple in Xcode 8.3 release notes
Xcode 8.3 no longer supports Swift 2.3.
I have a lot of work before I migrate to Swift 3.0 And I want My app on AppStore soon before I migrate.
Keeping in mind that apple has recently relaease a new version Xcode 8.3 and iOS 10.3, will I be able to upload the iOS app to appstore using my older version of Xcode 8.2
NOTE: I already have an active version x.x of my app on appstore. I need to upload a new version.
As stated here and here, any version from Xcode 6.0 and over, regardless of which language (and language version) you use, will do.