Fix compiler warnings

[JordanMartinez]

Fixes the compiler warnings I missed in #57

However, I'm not sure what to do about this compiler warning:

Warning 1 of 71:

  in module Type.Data.Ordering
  at .spago/typelevel-prelude/master/src/Type/Data/Ordering.purs:15:1 - 15:27 (line 15, column 1 - line 15, column 27)

    Module Prim.Ordering was imported as PO with unspecified imports.
    As this module is being re-exported, consider using the explicit form:

      import Prim.Ordering (EQ, GT, LT, Ordering) as PO

  See https://github.com/purescript/documentation/blob/master/errors/ImplicitQualifiedImportReExport.md for more information,
  or to contribute content related to this warning.

[hdgarrood]

Merged in #63