Publish tests JAR (zio#1005)

`TestRuntime` is inherited by multiple tests throughout the codebase.
While it would be better to move it to `testkit`, such change would
create cyclic dependency between the modules. Instead, core's tests are
published as separate JAR reachable via classifier "tests".

Duplicate artifacts workaround

See
jvican/sbt-release-early#30
https://github.com/ThoughtWorksInc/sbt-best-practice/blob/50560203d1b75ca8763f46026a0486cb8dc12fa7/project/SonatypeReleaseEarly.scala

Update kind-projector to 0.10.2 (zio#922)

Update sbt-jmh to 0.3.6 (zio#762)

Cats MTL instances: ApplicativeAsk and ApplicativeLocal (zio#705)

* ApplicativeAsk instances

* ApplicativeLocal instance and tests

* Formatting

resolves zio#689: ClockSpec in Testkit not testing Test… (zio#697)

* resolves zio#689: ClockSpec in Testkit not testing TestClock

* apply fmt

remove 2.13 from cross build (zio#685)

Don't hardcode `Throwable` in cats typeclass derivation (fixes zio#645)…

… (zio#683)

Uncurried versions of 'bracket' and 'bracketExit' (zio#617)

* Uncurried versions of 'bracket' and 'bracketExit'

* Fixed doc and added specs

wait for the fiber to update the ref in FiberSpec (zio#652)

* fixed test case