Default Meta Values Not Influencing Derived Data

[crutchcorn]

This test fails:

  it('should have derived state on first render given defaultMeta', () => {
    const form = new FormApi({
      defaultValues: {
        name: '',
      },
    })
    form.mount()

    const nameField = new FieldApi({
      form,
      name: 'name',
      defaultMeta: {
        errorMap: {
          onChange: 'THERE IS AN ERROR',
        },
      },
    })

    nameField.mount()
    expect(nameField.getMeta().errors).toEqual(['THERE IS AN ERROR'])
  })

Because onUpdate only triggers when you actually update the state, not in the constructor.

[crutchcorn]

When finished, #1036 will solve these kinds of problems