when the prop name of the component is an array, throw error from 1.1.4 and later

[blusoul]

Subject of the issue

My unit tests started breaking from 1.1.4 and later

Steps to reproduce

    const wrapper = mount(
      {
        props: {
          name: ["start", "end"]
        },
        template: `<Wrapper><Inner :name="name" /></Wrapper>`
      },
      {
        stubs: {
          Wrapper,
          Inner
        }
      }
    );

    // name is array
    // from 1.1.4 throw error: TypeError: str.replace is not a function
    console.log(wrapper.findComponent(Wrapper));

Demo

Expected behaviour

When i downgrade to 1.1.3, it is ok, but findComponent({name: 'xxx'}) has error

[lmiller1990]

Thanks for the report, looks like we have a fix in #1857. I will work with the author to merge it.