Log Message:
Update to 0.2.3.2

changes:
0.2.3.2
  - D.H.Strict: only evaluate values if used
      Before this change all value arguments would be evaluated to WHNF even
      if they were never inserted into the map.
      Fixes https://github.com/tibbe/unordered-containers/pull/69
      Fixes https://github.com/tibbe/unordered-containers/issues/57
      Also fix a strictness bug in fromList (fixes \ 
https://github.com/tibbe/unordered-containers/pull/61).