I'm running MacOS Mojave 10.14.6 with Xcode 10.2.1 installed. The Mac App Store doesn't show any update option for 10.3. In App Store, Account -> Purchases section shows Xcode with a Cloud with a down arrow icon, as if Xcode is not installed and needs a re-download.
The last time I had this issue and pressed the Cloud icon, I had issue with synchronising my GitHub account and had to reinstall everything.
How can I update to Xcode 10.3?
PS: Can't update Xcode recommends bypassing the App Store, but I had used the App Store in the past to install and update it. Given the download size, something that is guaranteed to work would be great.