message: fix(supervisor): remove loop in Supervisor.fibersIn
diff: @@ -16,18 +16,12 @@ export function fibersIn(
  new Supervisor(
  succeed(() => ref.get),
  (environment, effect, parent, fiber) => {
  - let loop = true
  - while (loop) {
  const set = ref.get
  - loop = !ref.compareAndSet(set, SS.add_(set, fiber))
  - }
  + ref.set(SS.add_(set, fiber))
  },
  (exit, fiber) => {
  - let loop = true
  - while (loop) {
  const set = ref.get
  - loop = !ref.compareAndSet(set, SS.remove_(set, fiber))
  - }
  + ref.set(SS.remove_(set, fiber))
  }
  )
  )
  