Merge pull request #88 from domenkozar/cabal-fixes

Catch up with cabal modifications on hackage

Author: simonmar

happy.cabal

@@ -120,6 +120,12 @@ extra-source-files:
 	tests/precedence002.y
 	tests/test_rules.y
 
+custom-setup
+  setup-depends: Cabal <2.1,
+                 base <5,
+                 directory <1.4,
+                 filepath <1.5
+
 source-repository head
   type:     git
   location: https://github.com/simonmar/happy.git
@@ -133,7 +139,7 @@ executable happy
 
   build-depends: base < 5,
                  array,
-                 containers,
+                 containers >= 0.4.2,
                  mtl >= 1.0
 
   extensions: CPP, MagicHash, FlexibleContexts