Cabal revisions of dhall-json-1.2.3

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

 Name: dhall-json Version: 1.2.3+x-revision: 1 Cabal-Version: >=1.8.0.2 Build-Type: Simple Tested-With: GHC == 7.10.2, GHC == 8.0.1     Location: https://github.com/dhall-lang/dhall-json  Library+    Other-Extensions: ApplicativeDo     Hs-Source-Dirs: src     Build-Depends:         base                      >= 4.8.0.0  && < 5   ,