Update to jest v27

[satazor]

Jest v27 was released a few days ago and we should upgrade it. I think we can't just bump the peer dependency because we need to upgrade babel jest etc.

Let's wait a bit for the ecosystem to upgrade and then we upgrade too.

//cc @acostalima @ruipneves @threequartersjohn

[acostalima]

⚠️ About Jest v27 and React Native Testing Library: https://github.com/callstack/react-native-testing-library#custom-jest-preset