Log Message:
Update to semigroups-0.20

0.20 [2021.11.15]
* Support hashable-1.4. The Hashable1 instances added in 0.19.2 are removed
  for all types except NonEmpty, in accordance with the corresponding
  changes from hashable-1.4.

0.19.2 [2021.08.30]
* Backport Hashable1 instances for NonEmpty, Min, Max, First, Last,
  WrappedMonoid, and Option.