fix: throw errors in setData and setProps for functional components

[eddyerburgh]

• Throw errors in setData and setProps when component is functional

setData can never work on a functional component. setProps could work, but will require a lot of code changes. In the meantime, we should throw an error instead of letting it fail silently

#402

[dimensi]

@eddyerburgh I get instead of a human readble error, I get

    TypeError: Cannot read property 'includes' of undefined

      29 |       default: [componentFirst(), componentSecond()],
      30 |     })
    > 31 |     wrapper.setProps({
      32 |       text: testText,
      33 |     })
      34 |     expect(wrapper.isVueInstance()).toBe(true)

      at node_modules/@vue/test-utils/dist/vue-test-utils.js:1378:39
          at Array.forEach (<anonymous>)
      at VueWrapper.setProps (node_modules/@vue/test-utils/dist/vue-test-utils.js:1375:21)
      at Object.test (tests/VueSprintfComponents.test.js:31:13)

[eddyerburgh]

This hasn't been released yet. Once it's released in beta.13 you should get a human readable error