The config.xml reference at
https://cordova.apache.org/docs/en/latest/config_ref/index.html has an example for the widget attribute
android-versionCode: "0.1.3". That is a bad example, as the Android version code must be an integer (ref.
https://developer.android.com/studio/publish/versioning.html ).
Also I'm wondering why the attribute
android-packageName isn't documented here. It makes it possible to have a different ID (the reverse-domain identifier) for Android apps. Extremely useful in case you used different IDs for different platforms in the past (like me...).
(Id' love to have an easy way to report documentation issues. Currently the official way seems to be to make a pull request to a Github repo. Rather complicated, imho.)