Increase upper bound on directory

turtle.cabal

@@ -54,7 +54,7 @@ Library
         async                >= 2.0.0.0 && < 2.2 ,
         bytestring           >= 0.9.1.8 && < 0.11,
         clock                >= 0.4.1.2 && < 0.8 ,
-        directory            >= 1.0.7   && < 1.3 ,
+        directory            >= 1.0.7   && < 1.4 ,
         foldl                >= 1.1     && < 1.3 ,
         hostname                           < 1.1 ,
         managed              >= 1.0.3   && < 1.1 ,