Support for Android 4.2.2

I have an application that runs in android 4.2.2. I am running automation with Appium v1.15.1, it seems that that is the last version I can use to test android v4.2.2.

Are you guys going to retire or not support v1.15.1 at one point? I would like to know this as I need to support several customer that are using our application in android 4.2.2.