Update Jest

[fedekunze]

UI Version: 0.9.3

Description:

Updated my dependencies on package.json and by upgrading jest from 21.2.1 to 23.4.2 all my test broke and threw the same error:

  ● Test suite failed to run

    TypeError: jest.genMockFunction is not a function

       7 | global._Date = Date
       8 | global.Date = jest.fn(() => new global._Date(DATE_TO_USE.toISOString()))
    >  9 | Date.now = jest.genMockFunction().mockReturnValue(DATE_TO_USE.getTime())

Had to downgrade to de prev version to solve the issue, but in the long run we might have to change how we mock dates using jest.

See the following issue:

• chore: remove jest.genMockFn and jest.genMockFunction jestjs/jest#6173

[NodeGuy]

A better choice is to stop using mocks in accordance with my talk.

[faboweb]

Spiked this:

• not straight forward
• will need some investigation to solve strange bugs

Don't underestimate this.