Dict and Set for TSFoster/elm-uuid.
Re-implements elm-core's dictionary in order to replace the hardcoded comparable key type with an UUUID.
All the entities in all my projects use UUID as key-column/identifiers. The number of places where I used UUID.toString in Dict, Set, or any de-duplication after two years became scary. And retrieving those types from Dict.keys was a pain in the @ss.