0.2.3
-----
* Revamp `Setup.hs` to use `cabal-doctest`. This makes it build
  with `Cabal-2.0`, and makes the `doctest`s work with `cabal new-build` and
  sandboxes.

0.2.2
-----
* Fix compilation of tests with `stack`

0.2.1
-----
* Migrate zipper benchmarks from `lens`

0.1
---
* Repository initialized