Name collision: `singleton`

[maddie927]

Trying to build purescript-lists causes:

Error at /.../bower_components/purescript-lists/sr
c/Data/List.purs line 92, column 1 - line 93, column 1:
  Cannot declare "singleton" since another declaration of that name was imported f
rom Data.Unfoldable
Possible fix: hide "singleton" when importing Data.Unfoldable:
  import Data.Unfoldable hiding (singleton)

psc @ 0.7.4.1
purescript-lists @ 0.7.4
purescript-unfoldable @ 0.4.1