Support more than 1 action on simulator

[DanielZlotin]

This code works:

    it('starts with video view on first launch', (done) => {
      global.simulator.deleteAndRelaunchApp(() => {
        expect(element(by.id('VideoView'))).toBeVisible();
        done();
      });
    });

    it('does not display video view on second launch', (done) => {
      global.simulator.reloadReactNativeApp(() => {
        expect(element(by.id('VideoView'))).toNotExist();
        done();
      });
    });

while this fails (prints error: _onTestResult is undefined on testFailed):

    it('starts with video screen on first launch only', (done) => {
      global.simulator.deleteAndRelaunchApp(() => {
        expect(element(by.id('VideoView'))).toBeVisible();
        global.simulator.reloadReactNativeApp(() => {
          expect(element(by.id('VideoView'))).toNotExist();
          done();
        });
      });
    });

I tracked the reason to this

Also, #57 would make this code much prettier

[rotemmiz]

using async await instead of invocaction queue and callbacks will solve this.
#38

[rotemmiz]

new async await api is no in master, check out the test project. upcoming detox version (5.0.0) breaks the api completely in favor of async await.

device actions are now async await as well, you can now do

    it('starts with video screen on first launch only', () => {
       await device.deleteAndRelaunchApp();
       await expect(element(by.id('VideoView'))).toBeVisible();
       await device.reloadReactNativeApp();
       await expect(element(by.id('VideoView'))).toNotExist();
    });