Fix the "list-t" dep

hasql.cabal

@@ -1,7 +1,7 @@
 name:
   hasql
 version:
-  0.3.0
+  0.4.0
 synopsis:
   A minimalistic general high level API for relational databases
 description:
@@ -105,7 +105,7 @@ library
     bytestring == 0.10.*,
     text >= 1.0 && < 1.3,
     -- control:
-    list-t >= 0.2.4 && < 0.4,
+    list-t >= 0.3 && < 0.4,
     monad-control == 0.3.*,
     transformers-base == 0.4.*,
     -- errors:

library/Hasql.hs

@@ -279,12 +279,13 @@ tx m t =
 newtype TxListT s m r =
   TxListT (ListT.ListT m r)
   deriving (Functor, Applicative, Alternative, Monad, MonadTrans, MonadPlus, 
-            Monoid, ListT.ListMonad)
+            Monoid, ListT.MonadCons)
 
-instance ListT.ListTrans (TxListT s) where
+instance ListT.MonadTransUncons (TxListT s) where
   uncons = 
-    unsafeCoerce 
-      (ListT.uncons :: ListT.ListT m r -> m (Maybe (r, ListT.ListT m r)))
+    (liftM . fmap . fmap) (unsafeCoerce :: ListT.ListT m r -> TxListT s m r) .
+    ListT.uncons . 
+    (unsafeCoerce :: TxListT s m r -> ListT.ListT m r)
 
 
 -- * Statements execution