version changed to 3, circle ci to use ghc 7.10.1, stricter import/export in PgQuery and remove of dead code

src/PostgREST/Auth.hs

@@ -19,8 +19,8 @@ module PostgREST.Auth (
   ) where
 
 --line needed for ghc 7.8
-import           Data.Functor            ((<$>))
- 
+--import           Data.Functor            ((<$>))
+
 import           Data.Aeson              (Value (..), Object)
 import           Data.Aeson.Types        (emptyObject, emptyArray)
 import           Data.Vector             as V (null, head)