## 0.2.10.0
* Add `HashMap.alterF`.
* Add `HashMap.keysSet`.
* Make `HashMap.Strict.traverseWithKey` force the results before
installing them in the map.
## 0.2.9.0
* Add `Ord/Ord1/Ord2` instances. (Thanks, Oleg Grenrus)
* Use `SmallArray#` instead of `Array#` for GHC versions 7.10 and above.
(Thanks, Dmitry Ivanov)
* Adjust for `Semigroup => Monoid` proposal implementation.
(Thanks, Ryan Scott)
### Bug fixes
* Fix a strictness bug in `fromListWith`.
* Enable eager blackholing for pre-8.2 GHC versions to work around
a runtime system bug. (Thanks, Ben Gamari)
* Avoid sketchy reimplementation of `ST` when compiling with recent
GHC.
### Other changes
* Remove support for GHC versions before 7.8. (Thanks, Dmitry Ivanov)
* Add internal documentaton. (Thanks, Johan Tibell)
## 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