supervisors-0.2.1.0: CHANGELOG.md

# Revision history for supervisors

## 0.2.1.0 -- 2020-01-26

* Fix a bug that could potentially result in some threads not being
  killed.

## 0.2.0.0 -- 2018-12-18

* Make the type of `withSupervisor` more general.
* Drop unneeded dependency on `unliftio`.

## 0.1.0.0 -- 2018-11-10

* First version. Released on an unsuspecting world.