Cabal revisions of geojson-4.0.0

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

 name:                   geojson version:                4.0.0+x-revision: 1 license:                BSD3 license-file:           LICENCE author:                 Dom De Re     tag:                3.0.4  library+    build-depends: aeson <1.6+     hs-source-dirs:     src     build-depends:      base < 5 &&     >= 4.9                     ,   aeson           >= 0.8