gui: Json.Decode.customDecoder was removed in elm-lang/core 5.0.0
gui: Json.Decode.customDecoder was removed in elm-lang/core 5.0.0

https://github.com/elm-lang/core/commit/9076c49a0d58596f21d9f220bfa8f323a0876b48

cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop