Cabal revisions of potoki-core-2.3.1

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name: potoki-core version: 2.3.1+x-revision: 1 synopsis: Low-level components of "potoki" description:   Provides everything required for building custom instances of     profunctors >=5.2 && <6,     ptr >=0.16.2 && <0.17,     scanner >=0.3 && <0.4,-    stm >=2.4 && <3,+    stm >=2.4 && <2.5,     text >=1 && <2,     time >=1.5 && <2,     transformers >=0.5 && <0.6,