goodbye scalaz.concurrent.Task
goodbye scalaz.concurrent.Task

since scalaz 7.3

- https://github.com/atnos-org/eff/commit/645e23e96034c81cb8c7dbfeb1f6055d4ea36dd9
- https://github.com/scalaz/scalaz/pull/2037
atnos-org/eff-cats,atnos-org/eff,etorreborre/eff-cats