Una volta convertita la libreria nel formato 1.5.x si può chiede l'inclusione nel library manager.
--> Library Manager FAQ · arduino/Arduino Wiki · GitHub
In particolare:
How can I add my library to Library Manager?
Ensure your library is complaint with 1.5 format
Tag it and push the tag, or create a release with github "releases"
Open an issue on Arduino's github, specifying the git repo (or github url) from where to download your library