rcu-0.2.4: CHANGELOG.markdown

## 0.2.4 [2019.05.02]
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* Support building with `base-4.13` (GHC 8.8).

## 0.2.3 [2018.08.01]
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* Add `MonadFail` instances for `ReadingRCU` and `WritingRCU`.

## 0.2.2 [2018.02.06]
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* Include `HLint.hs` with the tarball distribution, fixing the `hlint`
  test suite.

## 0.2.1
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* Support `doctest-0.12`

## 0.2
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* 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
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* Initial version