Issues with firebase hosting using jason darks video tutorial

Hi all im trying to set up a free site for a friend using firebase hosting through following this video. it has worked brilliantly when i used it initially a few months ago but now im all im getting when i try to install firebase is ‘You must install peer dependencies’ has anyone tried this recently and had the same issue??? and more importantly figured out what the hell that means??

https://www.youtube.com/watch?v=K21WClcKo4g&t=6s