Cabal revisions of shake-0.19.4

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

 build-type:         Simple name:               shake version:            0.19.4+x-revision: 1 license:            BSD3 license-file:       LICENSE category:           Development, Shake         deepseq >= 1.1,         directory >= 1.2.7.0,         extra >= 1.6.19,-        filepath,+        filepath >= 1.4,         filepattern,         hashable >= 1.1.2.3,         heaps >= 0.3.6.1,