Magnolia derivation for Debug typeclass (#1371)

add: `ZValidation#isSuccess` & `ZValidation#isFailure` (#1367)

Ensure green CI with re-actors/alls-green (#1358)

Scala Native 0.5.x (#1351)

Fix: `SubtypeCustom[A]` should behave like subtype of `A` (#1328)

* Add test validating that passing a `Subtype[String]` and a `SubtypeCustom[String]` to a function asking for a `String` does compile

* clean

* Fix: `SubtypeCustom[A]` should behave like subtype of `A`

* Add missing `override`

Bring Ring-like structures to ZIO Prelude (#351)

Optimize execution of `ZPure` (#1306)

* Optimizations for ZPure runloop

* Improve Fold

* Use `packed0 != 1`

* One more test for sanity's safe

* Final cleanups

* Reimplement runloop via a Runner class and use thread locals to cache runners

* Cleanup Fail loop

Add tap and unit to ZValidation (#1299)

Shortcut `foreach` on empty collections (#1252)

Remove redundant Abstractions diagram file (#1241)