Add 1024x1024px App Store icon required since Xcode 9

Email sent by iTunes Connect:

From: iTunes Store <itunesconnect@apple.com>
Date: Thu, Dec 14, 2017 at 5:24 PM
Subject: iTunes Connect: Your app "Nuxeo" (Apple ID: 1103802613) has one or more issues

Dear developer,

We have discovered one or more issues with your recent delivery for "Nuxeo". Your delivery was successful, but you may wish to correct the following issues in your next delivery:

Missing App Store Icon - iOS Apps must include a 1024x1024px App Store Icon in PNG format. Without providing the icon in the Asset Catalog or via iTunes Connect, apps cannot be submitted for App Review or Beta App Review. Refer to https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/app-icon/ for more information.

After you’ve corrected the issues, you can use Xcode or Application Loader to upload a new binary to iTunes Connect.

Regards,

The App Store team