devel/hs-these: Update to 1.2

* Depend on bifunctor-classes-compat instead of bifunctors See changelog
  note in bifunctors-5.6:
  https://hackage.haskell.org/package/bifunctors-5.6/changelog This is
  breaking change, but affects only GHC-8.0 and older users. In that case
  you should check various combinations of newer/older bifunctors, these
  (and e.g. semialign) packages.
* Depend on assoc-1.1. Since version 1.1 assoc has an almost trivial
  dependency footprint, so these depends on it unconditionally.
* Add Bifoldable1 These instance
* Add Foldable1 (Data.Functor.These1 f g) instance
* Change Eq (These1 f g a), Ord, Read, Show, NFData instances similarly to
  how they are changed for Product and Sum in base-4.18.0.0.

(pho)