concat-stream dependency breaks build

[jackdijkema]

concat-stream dependency has been taken offline and isn't available anymore on github in yarn.lock.
also breaks local-deploy.

"concat-stream@github:hugomrdias/concat-stream#feat/smaller":
  version "2.0.0"
  resolved "https://codeload.github.com/hugomrdias/concat-stream/tar.gz/057bc7b5d6d8df26c8cf00a3f151b6721a0a8034"
  dependencies:
    inherits "^2.0.3"
    readable-stream "^3.0.2"