Update to elm 0.19

[haskell-servant]

Update to elm 0.19

[FranklinChen]

Eventually I'll get around to updating my incomplete pull request #7 to use elm-bridge, unless someone wants to take over and start with that Elm 0.19 fork to do that.

[FranklinChen]

I was referring to my fork and branch of this project https://github.com/FranklinChen/example-servant-elm/tree/elm-0.19

I have already begun using servant-elm 0.6.0.2 in this branch.

[k-bx]

See work done in haskell-servant/servant-elm#49

[k-bx]

Just FYI, it's not a fork anymore, but a released version of servant-elm package (currently 0.6.0.2) http://hackage.haskell.org/package/servant-elm