Arbitrary-precision Decimal numbers for Elm.

This package is simply an Elm 0.19 friendly version of the original elm-decimal library. Prikhi updated the original for Elm 0.18 in the package decimal.

unsafeFromString was removed in this package from the original due to the remove of Debug.crash from Elm 0.19.

• Original from javcasas' elm-decimal
• This repo forked from prikhis' decimal to update for Elm 0.19.