kure-2.18.6: CHANGELOG.md

## 2.18.6
* Maintenance update for GHC and base library changes involving Typeable, SemiGroup and MonadFail

## 2.16.12
* Derive `Typeable` instances

## 2.16.5
* Allowed building with `base-4.8.0.0`
* Removed unneeded `Monoid` constraints on `OneT` instances