How does this differ from the Automation in mintupdate which for BL5.1 can be installed via apt or from synaptic?
With BL6.0 pre-alpha I have been using a mintupdate tool maintained by gm10 a former Mint developer. I get it, his PPA is not in the repository so use at your own digression. I have followed gm10 and his updater on the Mint forum for a few years - I trust it and it works for me. I would expect when BL6.0 is released the mintupdate tool will be in the repository.