Update .travis.yml

Author: sharkdp

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-  - 0.10
+  - stable
 env:
   - PATH=$HOME/purescript:$PATH
 install:

src/Data/BigInt.purs

@@ -15,7 +15,7 @@ module Data.BigInt
 
 import Prelude
 
-import Data.Maybe
+import Data.Maybe (Maybe(..))
 
 -- | An arbitrary length integer.
 foreign import data BigInt :: *