Release tracking ticket for 8.8.3

This is the template to be used to create release tracking tickets. Copy this into a new issue and fill in the TODOs. Those items marked with major-only can be ignored for minor releases.

This is the release checklist for the TODO milestone. See #16816 for the template that this was derived from.

Pre-release checklist

• (major-only) Remove the release notes for the previous release (e.g. docs/users_guide/8.6.*-notes.rst)
• (major-only) Make release branch (e.g. ghc-8.8)
• (major-only) Make post-release branch (e.g. ghc-8.9-start)
• Submodules on released tags (produced using this script):
  • libraries/Cabal: todo (on Cabal-v3.0.1.0-rc2)
  • libraries/Win32: version 2.6.1.0
  • libraries/array: version 0.5.4.0
  • libraries/binary: version 0.8.7.0
  • libraries/bytestring: version 0.10.10.0-ghc1
  • libraries/containers: version 0.6.2.1
  • libraries/deepseq: version 1.4.4.0-r1
  • libraries/directory: version 1.3.6.0
  • libraries/filepath: version 1.4.2.1-ghc1
  • libraries/haskeline: version 0.7.5.0-ghc1
  • libraries/mtl: version 2.2.2
  • libraries/parsec: version 3.1.14.0
  • libraries/pretty: version 1.1.3.6
  • libraries/process: version 1.6.8.0
• Non-released submodules up-to-date:
  • nofib
  • libffi-tarballs
  • libraries/integer-gmp/gmp/gmp-tarballs
• Release notes (docs/users_guide/x.y.z-notes.rst) written
• Release notes linked in docs/users_guide/index.rst
• autoconf scripts updated
• Check that Unicode database in base (libraries/base/cbits/README.Unicode) reflects current standard release (http://www.unicode.org/versions/latest/)
• LlvmVersion in configure.ac is targetting intended LLVM version
• Release notes mentions LLVM version requirement
• llvm-targets file updated
• Changelogs updated (these can be checked using .gitlab/linters/check-changelogs.sh):
  • libraries/ghc-prim
  • libraries/integer-gmp
  • libraries/integer-simple
  • libraries/hpc
  • libraries/base
• Verify that the ~"backport needed" label has no more issues/merge requests needing backport
• Verify that all CI builds are green before moving to release checklist

Release checklist

• Make tag
• Wait until builds finish
• Fetch release artifacts TODO: documentation
• Sign and push release artifacts to downloads.haskell.org [TODO: documentation]
• Release/revise GHC-maintained libraries on Hackage [TODO: documentation]
  • libraries/base
  • libraries/ghc-prim
  • libraries/array
  • libraries/stm
  • libraries/ghc-heap
  • libraries/ghc-compact
  • libraries/ghc-boot
  • libraries/ghc-boot-th
  • libraries/hpc
  • libraries/libiserv
  • libraries/template-haskell
  • libraries/integer-gmp
  • libraries/integer-simple
• Update ghc/homepage>:
  • Write download page (see ghc/homepage>)
  • Add news item to index.html
  • Add link to download.shtml
  • Look over changes locally
  • Add release announcement to GHC blog
  • Push changes to master
• Announce on: GHC developers <ghc-devs@haskell.org>, GHC Users <glasgow-haskell-users@haskell.org>, Haskell Cafe <haskell-cafe@haskell.org>
• Announce on: Haskell Discourse, /r/haskell, Twitter
• Update latest symlink on downloads.haskell.org
• Ensure that the Migration page is up-to-date

Post-release checklist

• Update the Wiki status page
• Update the language pragma history
• Mark milestone as closed
• Update the VersionHistory wiki page
• Set RELEASE=NO