title: How to use upgrader package in flutter
body: <p>How can I use the use the upgrader package in flutter, like how can I make an AppCast file and use AppCast Configuration for my app and how do I show release notes on the alert. And how do I get the right versions. This package <a href="https://pub.dev/packages/upgrader/example" rel="nofollow noreferrer">https://pub.dev/packages/upgrader/example</a></p>