message: chore(core): convert fiber tests to use tsplus ref
diff: @@ -8,7 +8,7 @@ import { FiberId } from "../../src/io/FiberId"
  import * as FiberRef from "../../src/io/FiberRef"
  import { Promise } from "../../src/io/Promise"
  import { Queue } from "../../src/io/Queue"
  -import * as Ref from "../../src/io/Ref"
  +import { Ref } from "../../src/io/Ref"
  import { TraceElement } from "../../src/io/TraceElement"
  import { withLatch } from "../test-utils/Latch"
  @@ -23,14 +23,12 @@ describe("Fiber", () => {
  .bind("ref", () => Ref.make<boolean>(false))
  .bind("fiber", ({ ref }) =>
  withLatch((release) =>
  - (release > Effect.unit)
  - .acquireRelease(Effect.never, Ref.set_(ref, true))
  - .fork()
  + (release > Effect.unit).acquireRelease(Effect.never, ref.set(true)).fork()
  )
  )
  .tap(({ fiber }) => Fiber.toManaged(fiber).use(() => Effect.unit))
  .tap(({ fiber }) => Fiber.await(fiber))
  - .flatMap(({ ref }) => Ref.get(ref))
  + .flatMap(({ ref }) => ref.get())
  const result = await program.unsafeRunPromise()
  