## 0.2.7.1

 * Fix linker error related to popcnt.

 * Haddock improvements.

 * Fix benchmark compilation when downloaded from Hackage.

## 0.2.7.0

 * Support criterion 1.1

 * Add unionWithKey for hash maps.

## 0.2.6.0

 * Mark several modules as Trustworthy.

 * Add Hashable instances for HashMap and HashSet.

 * Add mapMaybe, mapMaybeWithKey, update, alter, and
   intersectionWithKey.

 * Add roles.

 * Add Hashable and Semigroup instances.

## 0.2.5.1 (2014-10-11)

 * Support base-4.8