Bump Cabal version.

Probably just temporary, required to make Travis green.

Author: 23Skidoo

Cabal/Cabal.cabal

@@ -1,5 +1,5 @@
 name: Cabal
-version: 1.24.0.0
+version: 1.24.1.0
 copyright: 2003-2006, Isaac Jones
            2005-2011, Duncan Coutts
 license: BSD3

cabal-install/cabal-install.cabal

@@ -248,7 +248,7 @@ executable cabal
         base16-bytestring >= 0.1.1 && < 0.2,
         binary     >= 0.5      && < 0.9,
         bytestring >= 0.9      && < 1,
-        Cabal      >= 1.24     && < 1.25,
+        Cabal      >= 1.24.1   && < 1.25,
         containers >= 0.4      && < 0.6,
         cryptohash-sha256 >= 0.11 && < 0.12,
         filepath   >= 1.3      && < 1.5,