Upgrade to optparse-applicative-fork-0.18.1.0

[newhoggy]

Changelog

- description: |
    Upgrade to `optparse-applicative-fork-0.18.1.0`
  compatibility: compatible
  type: maintenance

Context

Upgrade to optparse-applicative-fork-0.18.1.0 to unblock ghc-9.6 work. This will affect the formatting of how the CLI usage is rendered so there will be a lot of formatting changes in the golden files.

optparse-applicative-fork-0.18.1.0 is already published to CHaP, however, there is currently an SRP which will be removed once the CHaP index includes the optparse-applicative-fork-0.18.1.0 package version.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• The change log section in the PR description has been filled in
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• The changelog section in the PR is updated to describe the change
• Self-reviewed the diff

Note on CI

If your PR is from a fork, the necessary CI jobs won't trigger automatically for security reasons.
You will need to get someone with write privileges. Please contact IOG node developers to do this
for you.

[carbolymer]

Why do we need to maintain the fork in the first place?

[erikd]

This is in CHaP now right?