Update README for 0.4.0-alpha
Update README for 0.4.0-alpha

nukisman/elm-format-short,avh4/elm-format,avh4/elm-format,nukisman/elm-format-short,nukisman/elm-format-short,avh4/elm-format,avh4/elm-format,nukisman/elm-format-short,nukisman/elm-format-short