Update Show.tsx

[ivanjeremic]

no need to call fallback()

[seppwc]

Hi thanks for the PR.

Ideally things which are api changes I would prefer to have an issue made first. but thats my fault for not have a contributors guide.

Im happy to go this route though, as after testing this pattern on a prototype doesn't seem to have any major problems with this implementation, and i guess is more consistent with how other libraries deal with passing components as props.

the main problem setting this back is that the tests, types (fallback prop) and storybook are all broken because of this change. These will need to be updated/fixed before this gets merged

Show › renders fallback if "when" is falsy

    expect(received).toBeTruthy()

    Received: null

      37 |     setup({when: false, fallback: FallBack});
      38 |     expect(screen.queryByText(Text.default)).toBeNull()
    > 39 |     expect(screen.queryByText(Text.fallback)).toBeTruthy()
         |                                               ^
      40 |   });
      41 |
      42 |   it('renders children if "when" is true, with fallback', () => {

      at Object.<anonymous> (src/components/Show/Show.test.tsx:39:47)

[seppwc]

@ivanjeremic