ghc-plugs-out-2.0.0.0: changelog.md

# Versions of ghc-plugs-out

## 2.0 Options and Haddocks
* Add tests that show how options interact with type checker plugins.
* Add haddocks.

## 1.0 Initial Release
* Add tests that show how type checker plugins interact with GHC depending on
  their purity, how they're wired up and whether GHC needs help type checking.