Umbe I am also looking forward to an update for beta.15. If @Kylo doesn't do it, I will fork the repo and update it in the coming weeks.
iPurpl3x can read this answer https://discuss.flarum.org/d/22779-diff-for-flarum/132
DursunCan OK good to know, then I will take over as soon as I have time to do it.
Closing as per @Kylo's request, please use GB Password Strength instead.