[ANN] Fourmolu 0.21.0.0 released!

Fourmolu 0.21.0.0 has been released! Fourmolu is a configurable Haskell formatter forked from Ormolu. This release comes with all the improvements from Ormolu 0.9.0.0, with a major overhaul of comments, thanks to Mark Karpov! Should be available via ghcup soon