Support GHC 9.6, bump CI

[andreasabel]

• relax ghc-prim < 0.11
• bump CI to 9.6.0, 9.4.4 and 9.2.6
• add default-extensions: TypeOperators to silence warning in GHC >= 9.4
• some cabal cosmetics

Superseds:

• 213

Revisable bits published as revision 3: https://hackage.haskell.org/package/attoparsec-0.14.4/revisions/

[andreasabel]

Thanks! (But I'm not a maintainer here)

Thanks for the review! The algorithm suggested you...