Update Jest dependencies

[SimenB]

jest-matchers has been renamed to expect and jest-circus is on a 22 version. If later versions of jest-circus does not work in the browser, please open up an issue 🙂

[kvendrik]

PR open here that updates jest-matchers to expect and opened an issue here that addresses jest-circus's browser support in the latest version. Will ship the PR pretty soon. 🙂