optics-vl-0.2.1: CHANGELOG.md

# optics-vl-0.2.1 (2020-04-15)
* Provide conversions from `Iso`/`Prism` to their VL representation

# optics-vl-0.2 (2019-10-18)
* Depend on new `indexed-profunctors` package

# optics-vl-0.1 (2019-09-02)
* Initial release