The library we depend on for Android publishing - Cordova Android - only recently published an update to meet the latest requirements. We've now updated to use that, but then it needs some more time for the update to reach a stable release as per our normal release schedule.
These days Google increase the API level requirement once a year, so I don't think there will be any new requirement until next year. Sometimes updating does not require any changes at all, but this year Android made a range of changes that mandated updates and so meant a bunch of things had to be changed both in the Cordova library and in our code. All the work's done though, and it's there on the latest beta releases.