title: How to get build and version number of Flutter app
body: <p>I am currently developing an application which is currently in beta mode. Due to this, I would like to show them what version they are on. For example, "v1.0b10 - iOS". So far, I have got this code: <code>Text("Build: V1.0b10 - " + (Platform.isIOS ? "iOS" : "Android"))</code>. How would I be able to get the build version and number within flutter?</p>