Add support for jest-circus

[d4vidi]

Add support for using jest-circus as the concrete runner when using Jest (i.e. instead of the default, which is jasmine2).

Apart from being important so as to stay up-to-date (jest-circus is what they describe as the next-gen runner), this is important in particular mainly due to this jasmine bug, which can become a serious time waster - typically if you're running an elaborate production e2e test suite.

[henrymoulton]

Just to vocalise how awesome this would be - I believe some of the flakiness seen with Detox setups is because of the virtualised environment of some CI setups. Having jest-circus would be great for this.

[d4vidi]

@henrymoulton thanks, we hope so too!