0.2.0.0: [2018.07.23]
---------------------
* Fixed the `Semiring` instances of `Set`, `HashSet`, `Vector`, `Storable Vector`, `Unboxed Vector`.
* Removed the `Semiring` instances of `Seq`, `Alt`, `Endo`.
* Added comprehensive test suite that tests all `Semiring` instances defined in Data.Semiring
* Added Free semiring (Data.Semiring.Free)
* Added newtypes: `Add`, `Mul`
* Bounds for containers: [0.3,0.6] -> [0.5.4,0.6.0.9]
* Add semiring instance for `Proxy`

0.1.2: [2018.05.04]
-------------------
* `semirings` now builds back to
  GHC-7.4.1.
* many doc fixes.

0.1.1: [2018.04.20]
-------------------
* Remove unused `coerce-util` dependency.

0.1.0:
------
* Initial version.