RELEASING

Update version in ghcup.cabal and boostrap-haskell (ghver variable at the top of the script)
Update GHCup.Version module. ghcupURL must only be updated if we change the GHCupInfo type or the YAML representation of it. The version of the YAML represents the change increments. ghcUpVer is the current application version, read from ghcup.cabal.
Add ChangeLog entry
Add/fix downloads in ghcup-<ver>.yaml, then verify with ghcup-gen check -f ghcup-<ver>.yaml and possibly (example only) ghcup-gen check-tarballs -f ghcup-<ver>.yaml -u 'ghc-8.10.7'. Generally, new GHC/cabal/stack/hls versions are only added to the latest yaml file. New GHCup versions are added to all (great care must be taken here to not break the parser... e.g. ARM platforms don't parse in all older formats).
Commit and git push with tag. Wait for tests to succeed and release artifacts to build.
Download release artifacts and upload them downloads.haskell.org/ghcup along with checksum files (sha256sum --tag * > SHA256SUMS && gpg --detach-sign -u <your-email> SHA256SUMS)
Add ghcup release artifacts to ALL yaml files (see point 4.)
Upload the final ghcup-<ver>.yaml to webhost.haskell.org/ghcup/data/.
Update bootstrap-haskell and bootstrap-haskell.ps1 to webhost.haskell.org/ghcup/sh/
Update the ghcup symlinks at downloads.haskell.org/ghcup