Future-proof re-exports from Data.Eq

[Bodigrim]

Resolves #390

I left CHANGELOG untouched, because there is currently no entry for unreleased changes, and I'm not sure whether this change requires an entry: it does not change anything for existing GHCs. Happy to add an entry, if you deem it worthwhile.

Checklist:

HLint

• I've changed the exposed interface (add new reexports, remove reexports, rename reexported things, etc.).
  • I've updated hlint.dhall accordingly to my changes (add new rules for the new imports, remove old ones, when they are outdated, etc.).
  • I've generated the new .hlint.yaml file (see this instructions).

General

• I've updated the CHANGELOG with the short description of my latest changes.
• All new and existing tests pass.
• I keep the code style used in the files I've changed (see style-guide for more details).
• I've used the stylish-haskell file.
• My change requires the documentation updates.
  • I've updated the documentation accordingly.
• I've added the [ci skip] text to the docs-only related commit's name.

[Bodigrim]

https://github.com/kowainik/relude/runs/4206002297?check_suite_focus=true fails with unrelated doctest errors, while an earlier build https://github.com/kowainik/relude/runs/4179485378?check_suite_focus=true succeeds. The only difference is that the older build uses doctest-0.18.2 and the new one - freshly released doctest-0.20.

Restricting doctest < 0.19 seems to help.

[chshersh]

Thanks!