docs(readme): fix test example

[deepsweet]

├── src/
│   └── components/
│       ├── bar/
│       │   └── index.js
│       └── foo/
│           └── index.js
└── test/
    └── src/
        └── components/
            └── foo/
                └── index.js

it's already correct.

[Awk34]

Oh, I see. It's still confusing. With that structure, I assumed the code following was being run from the root of that structure, alongside the src & test directories. I see now that the code is titled test/index.js. Maybe include that file in the example directory structure as well?

[deepsweet]

you are not the first person who was confused... so yes, example/ folder should help.