## 0.2.8.0
* Add `Eq1/2`, `Show1/2`, `Read1` instances with `base-4.9`
* `Eq (HashSet a)` doesn't require `Hashable a` anymore, only `Eq a`.
* Add `Hashable1/2` with `hashable-1.2.6.0`
* Add `differenceWith` function.
## 0.2.7.2
* Don't use -fregs-graphs
* Fix benchmark compilation on stack.
## 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