optparse-simple-0.1.1: ChangeLog.md

## 0.1.1

* Switch dependency `gitrev` to `githash`

## 0.1.0

* Migrate from `EitherT` to `ExceptT`
  [#8](https://github.com/fpco/optparse-simple/issues/8)

## 0.0.4

* Support `--help` on subcommands