update some more dependencies to current versions

Once again I kept the tight versioned dependencies rather than using a range, but I don't really know why they're used.

Author: joeyh

github.cabal

@@ -144,7 +144,7 @@ Library
  -- Packages needed in order to build this package.
  Build-depends: base >= 4.0 && < 5.0,
  time,
- aeson == 0.5.0.0,
+ aeson == 0.6.0.0,
  attoparsec == 0.10.1.0,
  bytestring,
  containers,
@@ -158,7 +158,7 @@ Library
  failure,
  http-types,
  vector,
- unordered-containers == 0.1.4.3,
+ unordered-containers == 0.1.4.6,
  data-default
 
  -- Modules not exported by this package.