0.1.3.0: [2018.05.23]
---------------------
* remove dependency on `constrictor`.
* some doc fixes.

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.