Marking a plugin as compatible with a new API version, especially a new major version update, is the thing you get to do when you have updated and thoroughly tested a plugin with a new PocketMine release (not an ever changing dev build), fixed previously deprecated function calls that have been removed, corrected code that needs correcting. Not forgetting that ideally you should also update any code that can run more efficiently, or be written more concisely.
Poggit plugins are updated for releases, not the ever-changing master branch.
Marking a plugin as compatible with a new API version, especially a new major version update, is the thing you get to do when you have updated and thoroughly tested a plugin with a new PocketMine release (not an ever changing dev build), fixed previously deprecated function calls that have been removed, corrected code that needs correcting. Not forgetting that ideally you should also update any code that can run more efficiently, or be written more concisely.
Poggit plugins are updated for releases, not the ever-changing master branch.