Unhelpful TODO output from decoder failure

[Janiczek]

We've hit this in our app:

https://ellie-app.com/66WPxcDYHDHa1

Json.Decode.decodeString Iso8601.decoder "\"2010-09-31T14:29:25.01235Z\""
--> Err (Failure "TODO deadEndsToString" <internals>)

That message originates in elm/parser, and the best way forwards would probably be for elm/parser to either implement it or stop exposing it, but right now it's probably on the users of elm/parser to not use it and instead provide their own implementation.

[rtfeldman]

Fixed in 1.1.4 thanks to @jamesrweb's PR!