Gate AbortController tests

We also test Node.js 14 which doesn't support AbortController

src/__tests__/waitForNode.js

@@ -74,6 +74,9 @@ test('ensures the given callback is a function', () => {
  )
 })
 
+const testAbortController =
+ typeof AbortController === 'undefined' ? test.skip : test
+
 describe('using fake modern timers', () => {
  beforeEach(() => {
  jest.useFakeTimers('modern')
@@ -220,7 +223,7 @@ describe('using fake modern timers', () => {
  `)
  })
 
- test('can be aborted with an AbortSignal', async () => {
+ testAbortController('can be aborted with an AbortSignal', async () => {
  const callback = jest.fn(() => {
  throw new Error('not done')
  })
@@ -238,7 +241,7 @@ describe('using fake modern timers', () => {
  expect(callback).toHaveBeenCalledTimes(2)
  })
 
- test('does not even ping if the signal is already aborted', async () => {
+ testAbortController('does not even ping if the signal is already aborted', async () => {
  const callback = jest.fn(() => {
  throw new Error('not done')
  })